Pleasurable homework

By The Nome King, trade for Ben300 @ Furaffinity

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Sounds of cascading water could be heard within the dorm room, clothes lay scattered upon the floor, and a few pairs of shirts and a set of jeans were over a bunk bed that sat in the far right corner of the roomy enclosure. A large wooden chest of drawers sat beneath a window, with a few more clothes scattered on top, with a desk in the other side of the room. For a room in university owned accommodation it was quite large, though there were some locations that had more room to spare; this set of rooms was located on a grassy field a mere ten minute walk from the campus. The sounds of flowing water and a voice could be heard coming from the bathroom, a voice that was singing rather badly. The bathroom was connected to the dorm room designed for two; a deep rumbling could be felt through the walls that originated from the pump that supplied the warm water to the shower head. Inside a slim man with a light complexion stood within a shower box, glass walls enclosing his naked body while suds and soap lathered up in his hair and over his torso. He continued to sing a random song, making up the words as he could only remember the tune, his fingers rubbing the shampoo into his scalp before washing it away.  After a few more minutes of washing he turned off the shower, sounds of dripping water could be heard as the glass door opened and Ben stepped out onto the cloth mat that lay in front of the door he’d just opened.

“Nahh numm daaa dahha….something something!” Ben sang happily as he grabbed a towel from the radiator in front of him and began padding it over his head to soak up the water, before going over his body with it, until finally he got sick of his singing. He cleared his throat and rubbed the towel over his slim tall frame, a large mirror stood in front of him on the opposing wall above the radiator which allowed him to see which parts needed drying. As far as bodies went Ben’s wasn’t all that remarkable, he was slim and toned and certainly didn’t have much fat on his body, his relatively short hair came down to his ears but he didn’t have the long flowing heavy metal style of hairdo that some students in his campus managed to pull off. A small black goatee and moustache adorned his face and chin; while his body remained mostly untouched by pubic hair, save for his genitals. Ben had never been pleased nor displeased his manhood, it’s always done the job just fine and since he’d had it bigger and smaller before, he didn’t really care.

Ben finished cleaning himself off and stepped off the shower mat, threw the towel back onto the radiator and vowed that’d put it into laundry for later, even though he knew that his roommate would probably just do it for him. He wandered from the bathroom into dorm room, tugging on a cord in the bathroom before leaving, to turn on the extract fan. He stepped over a large pile of clothes that sat in the doorway, before carefully navigating the mind field of dirty clothes. He sniggered as he realised he was not the cleanest of people and would often leave clothes and various items lying around, and had to strategically step over piles of clothes before he finally reached his desk. Ben had no gripes about being naked in his dorm room, at least when his roommate wasn’t there to pester him. He began rummaging through his stuff to try and find the reason he’d showered so early on in the day. He picked up a few socks and books that covered his desk, one or two shirts and some papers covered what he was searching for. Finally he found a small carbon fibre box, the latches had been released and it was open in front of him; once he’d removed the used t-shirt that had been covering it. He was pleased to have found what he was looking for, but was a bit concerned as to the whereabouts of its contents. Inside was a glass vial that looked as if it was designed to fit inside some kind of syringe. It sat inside a foam lining and there seemed to be an empty hole where another vial of the same size and design would presumably fit.

“Not again” Ben muttered under his breath as he looked around the room and realised it had gotten lost once again, his eyes scanned over the room and saw several piles of clothes and realised it would be rather fruitless searching for it now. He pulled the glass vial out from the case and turned it around, and saw that it’d been marked with a barcode, and a label that read “HS7582” with several warning symbols next to it. Ben sighed as he felt relieved he had the right one, if his roomie knew what the other one was he’d probably flip out with excitement.

“Hey Ben! The club was closed so I thought we could do…our home….work….together” A voice shouted loudly as the door swung wide open, Ben’s eyes closed as the familiar voice became quieter; realising that he was stark naked in his dorm room. Not another word was said until the door was closed and his roommate walked in and slowly padded over the clothes towards Ben.

“Didn’t expect me so soon hmmmm” Sam said with a smile as he walked towards Ben and looked down at his naked buttocks, suddenly breaking out into laughter as he threw his brown converse bag down onto the bed.

“SHhhh…shuttup dude” Ben said with a blush, as he looked around for some underwear to cover his shame, flubling around with the vial before Sam put his worries to rest.

“Nahhh its cool man, you wanna do it now? I’ve got the video recorder in my bag, all charged up” Sam replied with a noticeably British accent, while Ben’s was an odd mix of Spanish and Swedish. Ben nodded back with a grin and began to blush a little as Sam leaned over to grab the high definition recorder out of his bag, and placed it down on the bed.

“Now where did the injector go to, I swear you leave stuff lying around on purpose” Sam sniggered as he began picking up Ben’s clothes on the floor and throwing them to the side, rooting around to find the last piece of their homework related puzzle.

“It…it’s not that bad” Ben stammered in response as he saw Sam fling his underpants across the room and finally locating the large metal injector, his adrenal glands began to pump hormones into his body at the thought of things to come.

“Sure…and I suppose that time I found you acting like a swine, was totally nothing to do with that burst capsule on the floor” Sam replied, turning around with a grin as he pulled back a plunger on the injector, and then outstretched his hand towards the vial. Ben didn’t say a word as he looked down at the serum before passing it to his friend, who began priming it inside the medical grade syringe.

“Just…get on with it” Ben replied with a huff as he turned around towards the chest of drawers that sat beneath the window, and placed both hands on the wooden counter, shivering a little as he heard a loud rush of gas coming from the device Sam held within his hand. His friend merely sniggered as he walked towards the still naked Ben, and prodded his backside with a finger in jest; and then looked up at his blushing roommate.

“In the buttocks, like before?” Sam said as he flicked a lever on the injector, and a short set of three needles shot out from the tip of the device. Ben nodded and Sam carefully lined up the needles with Ben’s skin, before quickly plunging the pointed metal deep into his flesh. Ben exhaled at the sharp pain in his ass, and looked back to see Sam pull the trigger on the device. A loud “Clunk” was heard as the liquid was injected rather quickly into Ben’s rear, before Sam retracted the needles and removed the injector. He reached into his bag and pulled out a cotton pad from within in a sterile plastic bag, and gently placed it over the injection site, dabbing up and clotting the blood to seal the holes.

“Well?” Sam said as he removed the bloodied cotton swab and threw it aside into a nearby bin that sat next to Ben’s desk and tablet, while his still naked roommate reached a hand back and rubbed the red needle mark.

“That always hurts more than I expect, but yeah I can feel some warmth” Ben replied as he felt a pleasant heat spreading over his skin, which began to permeate deep within his flesh. Sam placed the injector on his Bed and picked up the camera, his fingers fiddling around with the buttons until he began to get a clear image of Ben’s backside upon the fold out LCD screen on the left hand side of the device. 

“Oh looks like we got some growth” Sam replied as he zoomed into Ben’s backside with the camera, and began recording the stretching skin. A quiet whimper from Ben indicated that things were starting to change, and feeling rather pleasant. Ben could feel the warmth in his backside growing against the skin; it was almost like something was pushing against his buttocks from within his body. He was used to this feeling, the sensation that was almost akin to having somebody inflate his rear end with hot water, almost like his buttocks were beginning to balloon and swell. The changes didn’t stop there and soon Ben began to feel a gentle sensation of tingling across his stretching skin, heat started to flush over the entire surface of his rump which centred on his anus.

“So if my memory’s correct, we’re on ungulates? So judging by the growth I’d say this is a bull?” Sam said as he zoomed in on Ben’s butt-crack as they began to stretch apart, the fat and swelling skin began to shift apart to reveal his roommate’s slowly swelling anus.

“N…nope….it’s your favourite” Ben stuttered and replied with a grin at the feeling of Sam’s hot breath against his rear as he moved the camera closer, trying to get all the details of his shifting pucker. 

“Ah damn it Ben! Why did you lose the other vial, you know how much I love these” Sam replied as he watched Ben’s asshole slowly change in colour and shape. The soft peach coloured human flesh began to slowly darken in tone; small blotches of black began to spread out from the inner part of Ben’s anus like some kind of infection, while the walls of his pucker began to swell up and push outwards as if it was being pushed from the inside. Moans escaped Ben’s mouth as he began to enjoy the feeling of his asshole changing and stretching apart to become thicker and wider; the shape remained the same but simply became larger. All the while his backside continued to swell and expand, most of the fat started to shift its position from the back to the sides. Burning sensations seared through his rear as new muscles began to grow underneath the skin, rippling and bulking up underneath the skin.

“Oh fuck it feels good” Ben moaned loudly as small hairs began to prick up from the skin, slowly spreading out from around his anus towards the upper part of his crack and around the swelling cheeks. 

“Looks like we finally have some fur!” Sam said aloud as he zoomed in on the black hairs that had begun sprouting from the changing skin, the tone of his flesh darkened before the short strands of fur grew out. It was fascinating to observe in fine detail the way the hairs grew, like a sprouting plant from the soil they seemed to wiggle before extending outwards to join the rest in a field of fur. More of Ben’s behind continued to grow, his buttocks seemingly throbbing in waves as more and more muscle rippled underneath the skin, pushing against the changing flesh and expanding outwards. Moans escaped his mouth, followed promptly by a blush as he felt something probing his now rather large thick black anus. He turned his head around and saw Sam with the camcorder still in hand, with the other hand prodding his pucker with a finger; and wearing a rather giddy expression.

“Du…..dduuuude!” Ben stammered and groaned as Sam tugged his finger upwards while circling around his thick black anus, unable to help how amazing it felt to have another object pressing against the tight muscular flesh. As Sam prodded and poked his pucker like a stupid child poking a pile of dung with a stick, Ben felt something else changing inside him. He could feel an object moving inside him, almost like it was tunnelling through the flesh. This sensation centred just above his thick black anus and began to manifest as a rather strange sensation of tugging. A few moments later a small nub began to develop upon the cleft of Ben’s buttocks, his massive cheeks stretched apart even more, which only gave Sam better access to tease his roommate’s hole even further, unable to contain his sniggering all the while. Ben blushed as these changes began to speed up; his penis had already hardened significantly and had begun throbbing sensually, his balls sagged down as the changes continued to ravage his rear end. The strange nub grew larger and longer with each gentle stroke from Sam’s finger upon Ben’s dark dense hole, the ring of his anus pushing out even more; becoming more pronounced than it’d previously been. It’d become so separated from his cheeks, Sam could have literally pinched the fat muscular doughnut like pucker with his fingers. He could feel muscles around the bottom of his anus being tugged upwards; tendons and ligaments that were attached to his coccyx began to expand. Gasps of joy escaped Ben’s lips as more and more flesh stretched upwards, and even Sam began to feel the muscles around Ben’s heavy black anus stretching upwards.

“I think….this is my….URgghhhh” Ben gasped loudly between moans, but even as the growth spread upwards he found that he could not complete his sentence. “Your tail?” Sam replied with a smile as he worked his finger around Ben’s pucker before gently pressing it against the centre and allowing it to slide inside, an act which Ben could only muster a groan of pleasure to retort with.

“Nngggg…stop it!” Ben gasped as he felt Sam’s finger gently slide against his now massive black walls, the muscles of his anus pulsating against his friend’s digit as the muscles in the growing lump tugged his pucker towards the ceiling. Sam watched and recorded all of these changes in fascinating detail, catching the way the dark matte black skin spread out from the cleft of Ben’s now wide sweeping buttocks. More and more muscle bulged up as the extending tail grew even longer, and Sam zoomed the camera in to watch as Ben’s anus continued to travel upwards until it met underneath the base of the growing lump. He could feel the bones moving inside his friend’s rear, his hips popping loudly, the vibrations travelling down his spine and into the joints of his growing tail. New muscles rippled through this expanding growth, the skin stretching as it grew even longer still; almost reaching the length of Sam’s lower arm. At this point it was big enough to grip in a fist; the width of it was about the same as a thumb across the whole surface. Without any hair it looked like a long tube of flesh, and yet it continued to grow even longer. Ben shivered in delight as he felt Sam’s finger slide out from his now unmistakably animal anus, and use all of his digits to form a tight grip around his tail, and gently tugged upwards to get a nice detailed view of his pucker and the dock of his growing appendage.

“How does it feel to have a tail, can you move it?” Sam asked as he began stroking the length of Ben’s long ropey appendage, watching his face redden in both embarrassment and ecstasy.

“I...think so” Ben replied he tried his best to concentrate behind the feelings that shot through his body from the changes, the sensation of Sam’s fingers against his new tail proved to be quite the distraction. He closed his eyes and tried to learn how to control the new muscles in his tail, and without much warning a sudden electric shock sparked through his buttocks and up his spine. His eyes shot wide open as he felt a whole new wave of feeling emanating from his tail, and slowly but surely he began to understand how to move this new limb. 

“There you go, must have just connected up” Sam said with a grin as he saw the tip of his tail wiggling around, and released his grip in order to allow Ben to move and feel through his newly grown long sensual appendage. Ben smiled with glee and began shaking his tail back and forth as it grew out from his swelling ass, the skin around his anus and tail had been totally changed to a lovely deep matte black colour, while the rest of his buttocks had been coated in a lovely soft coat of black fur. The fur spread upwards toward the dock of his now long flexible tail, the length of which measured to be a little bit longer than Sam’s arm. 

“Oh…I think we have hairs” Sam exclaimed loudly as he moved the camera down to Ben’s tail as he shook the black mass back and forth, small strands of much coarser hair started to push out from his flesh. Only a few strands managed to extend out, before even more jointed them until a long flowing wave of long black hair started extending out from his tail. Ben could feel these hairs pushing out from his skin, they manifested as a sensation of pins and needles, each hair felt like an irritating needle against his tail. He wagged his long ropey appendage back and forth, slapping it against his backside to try and ‘itch’ the rather irritating feeling of hair growth, the long strands dancing back and forth as they began to coat the entirety of his now fully grown equine tail.

“G…god d…d…damn I love horses!” Ben moaned loudly as he shook out the long strands of horsehair from his equine tail, moaning between his gasps of joy as Sam backed off from Ben’s behind after being whipped a few times by his hairs. Slowly but surely the hairs totally covered his tail from base to tip, the dock of his growth had gained a nice coating of black fur, and his large pronounced anus sat just below the base of his new equine appendage.

“Wow….you’re looking rather magnificent; I’d be telling a lie if said I wasn’t jealous” Sam replied as he gradually moved forwards again after Ben had stopped flicking his tail back and forth. His camera lens now began focussing upon Ben’s sagging human testicles; he’d been watching the skin above them changing from pink to dark matte black and noticed that his scrotum had begun to change colour. 

“I think I know what’s changing next” Sam said as he kneeled down to get the camera nearer to Ben’s upper legs, the camera’s gaze now set upon his balls. 

“What..what’s changing nygghhh! Ohhh fuck!” Ben said before his words were forcefully removed from his mouth, replaced with sounds of unexpected ecstasy as a powerful wave of arousal flushed through his body. It had felt like a thousand fingertips were gently brushing up against the soft sensitive skin of his scrotum, the balls inside rolling around before they began to gradually inflate.

“OHhhh wow!” Sam gasped as he watched the once pink skin blotch and shift towards an even darker black than the coat of fur that covered his body. He watched as the testicles inside began to swell and stretch out against the once loose sack of skin that’d contained mere human balls. Now they were becoming equine, and like balloons filling with water the growth of his testicles was quite a spectacle. Loud moans of joyful bliss escaped Ben’s maw, his eyes closed tight as he felt the changes ravage his testicles, all the while he could feel his cock getting harder and stiffer; like there was a burning heat flooding its cavernous tissue.

Ben’s groans became louder still as he felt his already erect penis throbbing and stretching forwards, he knew what this sensation was as he’d felt it before, it was the feeling of his masculinity changing to something totally inhuman. Ben bowed his head down and looked past his chest to see his cock swelling and stretching forwards, the once soft pink skin began to darken just like the rest of his body, and soon enough he felt the skin pressing against his crotch and belly. This was a sensation Ben had been subjugated to before, a sensation which he loved and enjoyed greatly. He could feel his cockflesh expanding and pressing up against the slightly hairy pelvic bone and lower belly. A sudden gasp of ecstasy escaped Ben’s mouth as he felt a large human hand gently cupping the underside of one of his rounded heavy testicles, which had grown much larger in the time his attention had been on his cock. He loved how it felt to have somebody else’s skin against his, the erogenous zone tingling as his balls inflated as if they filled up with fluid, sagging down with newfound weight and mass against his roommate’s fingertips. Sam could feel them stretching Ben’s once wrinkly scrotum apart, now it was a large rounded smooth silky bag of black flesh, with two massive testicles rolling around inside. They’d managed to reach the size of small apples and still continued to grow. The growth was akin to somebody placing a half empty water balloon in Sam’s palm, and slowly filling it up with hot liquid, the skin stretching out and tugging on the human flesh from the friction.

“Yes…..ohhhh mm…mmore!” Ben stammered and moaned as Sam gently stroked and kneaded his ball sack, eager to get all the changes on camera for their class; to show all the other students how Ben has shifted from human to horse and how every part of his body became equine with each passing second. Ben then felt the skin of his cock sticking to his belly and crotch, looking down his saw that the entirety of his penis had turned to the same shade of animal black, save his precum coated cock head which poked out of a rapidly loosening shaft. He saw the skin melding together with the pink skin of his crotch and belly, watching as the black skin seemed to spread away from where it joined with his belly, veins of black skin spread out from his shaft like some kind of evil corruption. He knew what this was, and what it meant; and Ben wanted nothing more than to feel his new equine cock slide out of this silky sack of black horseflesh. Sam couldn’t see what was happening to Ben’s penis, his massive growing testicles had him preoccupied and blocked out the view of his changing manhood. 

Ben didn’t say a word and instead enjoyed how it felt to have his friend gently holding his giant horse balls as they continued to inflate slowly, all the while his manhood changing as it tugged upwards towards his belly button. The flesh of his cock continued to expand apart, and seemed to become massive in comparison to Ben’s tiny human torso. The thickness of which was almost three times that of his original human shaft, while the length had almost doubled. Yet the entirety of his prick was inside his sagging black foreskin which finally stopped merging with his belly, and formed a huge sack of flesh. Ben carefully reached a hand down and used his finger to circle around the edges of his now fully changed equine sheath which reached up to cover his belly button, unable to help himself; he moaned loudly at the feeling of his fingers rubbing against the wet sensitive flesh. A powerful pungent smell began emanating from his sheath, the stench reminded him of a gym; musky sweat and a pure male odour. It was then his fingers met something he was familiar with, the tip of his sticky sensitive cockhead that was nestled deep inside his sheath. 

“Oh wow Ben….it’s getting big!” Sam said as he continued to record his balls, now reaching the size of large apples, and found he could only cup one of them in his free hand; the other hand carefully gripped the recorder as he began filming the changes to his skin that started spreading down toward his feet. Thick black fur spread down around his upper legs, while the muscles underneath began to swell and bulk up against the skin, though Ben was too preoccupied with the changes to his crotch to notice. He removed his finger as he felt his cock moving out of his musky stallion sheath for the first time, the silky flesh sliding up against the walls of his sheath as his cock began to grow out slowly. Blood filled the new changing cock, and slowly it began to extend forwards. 

Ben moved his head up to the ceiling, closed his eyes and moaned at the top of his voice. Sam grinned and continued to stroke his testicles, unaware that it was in fact the changes to his penis that had him so aroused. He felt more and more flesh sliding out against his sheath; it felt like there was a never-ending supply of dick as more and damper musky changing cock extended out in arousal. After a few more moments Ben looked down, his eyes bulging up as he saw the tip of his cock. However it was not where he expected it to be, instead he saw the tip of an oddly shaped shaft resting up against the top of his chest. A sudden powerful wave of arousal and blood shot up his body and into the new swelling cock, an act which caused the newly grown horse shaft to slap up against his belly and chest. This slapping action caused a short spurt of precum to go flying from the tip and splattered against the cabinet in front of Ben, the stench of his thick equine pre only spurred him on to desire more changes.

“OHHHH Aaahhh AHHHH FUCK!” Ben cursed loudly and grunted deeply at the feeling of his sensitive cockflesh slapping up against the human skin, his balls pulsating up and down at the sudden wave of arousal. The flesh had totally changed colour, where it had once been a reddish pink, it was now a marbled variation of different colours. Blotches of black and brown covered a mostly pink cock, the head seemed to be a strange mix of horse and human, it was clear it hadn’t finished changing yet.

“What the hell was that” Sam said as he stood up and leaned his head around to look underneath Ben’s belly, in an attempted to investigate the source of the slapping and splatting noises. His eyes bulged open and his mouth hung agape at the sight of a huge swelling horsecock slapping up against Ben’s small human body. He slowly moved the camera around with his eyes still locked upon the massive shaft, and began recording the changes to Ben’s equine cock tip. The entire shaft had become massive, it was over twice the width of a coke can and stood at about fifteen inches in length, it’d become so long that Ben was able to watch the tip of his cock changing a few mere inches away from his eyes. He could feel the flesh warping around his pisshole, the urethra moving upwards towards the top his flaring head, the edges bulking up around the girth of his stallion-hood. The flare separated off into separate rounded bumps, while the head itself flattened off into a rounded circular tip that seemed more blunted than his old human cock. He watched with fascination as his urethra began to push up from his head around a ring of flesh, the last changes ravaged his cock until it was impossible to tell that his penis had been anything but equine.

“Why didn’t you tell me that was happening; it would have been great for the video?!” Sam cried out as he zoomed into the damp musky stallion shaft, getting the details of the thick throbbing veins and the median ring that sat in the middle of his head and sheath. 

“Well I can’t….Urggh! Let you have all the f…fun!” Ben replied with a smile, moaning mid-sentence as he began willingly slapping his cock against his chest and belly, a crude form of masturbation for a prick too big to hold. At this point Ben’s backside had reached massive proportions, and his lower torso was slowly swelling up behind it to compensate for the disparity between his flanks and the tiny human body above. His butt must have been at least four times the size it was supposed to be, an ass that seemed more suitable on a horse than a human. Luckily that’s exactly what Ben was going to be, and it meant a bigger body to support that fine rump and set of equine genitalia. It was at this point Ben began to feel the changing heat moving away from his loins, it’d been centred there while his buttocks changed; but now it started to move down. He closed his mouth and groaned happily as he felt the warming sensations slowly sink into his lower limbs; realising that the changes were spreading to his lower extremities. 

“I’d get that camera….ughhh on my…legs” Ben moaned loudly as he felt the changes spreading down towards his feet, his upper legs had already changed a fair amount but they were nowhere near as thick as a horse. That was soon about to change as Ben’s muscles suddenly locked, searing heat burned through the fibrous tissue that surrounded his femur, and soon it began to spread down towards his feet. Sam immediately pulled the camera away from Ben’s large stallion prick which continued to noisily slap against belly, and instead directed it towards his roommate’s legs and feet. Sam had felt the changes that occurred to one’s feet when they went from plantigrade to digitgrade, but to observe the transformation to unguligrade was something else entirely. A smiled curled across Sam’s face as he observed Ben pushing his toes into the floor, pressing down hard and moving his ankles up into the air. While standing on his tip toes Ben could feel the groaning vibrations of his feet stretching out, the many bones that made up his foot began to fuse together into one long structure, all the while extending out and pushing his rear up into the air. Ben’s cheeks went bright red as he felt his heavy backside move upwards, his tail flicking upwards and exposing his rear while his lower body was forced down towards the cabinet. He pressed both hands against the wooden surface to try and retain his stability, his upper body unable to keep balanced now his legs were becoming longer and heavier, the disparity between his upper and lower body only grew more obvious now his legs were changing. He leaned down and rested his lower arms on the desk, looking back to see a massive stretching black furry horse ass where his human buttock should be. The feeling was unreal as new strong heavy muscles swelled up underneath his skin, pressing up and bulking against the darkening tone of skin that coated his upper legs. 

“Oh wow your feet…your nails!” Sam said with excitement as he moved the camera lens towards Ben’s toes, the hard keratin nail appeared to be swelling up from his middle toe, while at the same time; the other toes appeared to be shrinking. Meanwhile his feet had begun to take shape, and appeared to be growing into the lower part of a hind leg, while his femur and the associated muscles were slowly being dragged upwards into his lower torso and flanks. Being a quadruped Ben would have to rely on backward jointed hind legs to move around, his huge flanks and giant ass would support all that extra weight he’d eventually put on. More muscle developed around his legs as they increased in length and girth, while his ‘upper leg’ started to recede even more into his upper body. 

Ben shuddered as he felt his nails scraping up against the floor; his middle toe began to swell up to the point where it was almost impossible to tell he ever possessed any other digits. His other toes had shrunk down so much they were merely stubs on the end of his leg; and the nails were slowly being pulled into the skin, while the digits themselves slowly vanished. Ben could sense his other digits slowly shrinking away to nothing, and perceived it as a loss of sensation, he almost wanted to wiggle his toes but found that only the huge fat middle toe remained. However this middle ‘toe’ had gotten so large it wasn’t a toe anymore but an extension of his leg. The flesh from his ‘ankles’ moved down a smooth muscular lower hind leg to the tip of his swelling nail, it was almost impossible to tell he’d ever possessed digits of any kind. Sam tightly gripped the camcorder and began to sweat as he himself, loved to see the transition of feet to hooves, it was marvellous to watch the highly sophisticated series of ligaments, digits and bones change into a heavy hunk of nail.

“Oh god…they feel so heavy” Ben gasped loudly as he continued to slap his cock against his belly and chest, all the while moving his legs back and scraping the growing hooves against the wooden floor of the dorm room. Sam gently stroked his hand down Ben’s changing leg, feeling the fur of his flanks slowly change to soft stretching human skin, feeling the rippling muscle underneath. Ben flicked his tail back and forth and wacked Sam in the face, an action which caused Sam to cough the hairs out of his face in shock.

“GAHHH!” He cried out as Ben let out a giggle, flicking his tail up and around his backside before turning to face his friend, whose expression of annoyance quickly turned into a smile.

“You should know not to get behind a horse” Ben sniggered as Sam removed his hands from the shifting muscular hind leg; the sounds of giggling were heard as both roommates laughed at each other before the transformation took their attention away. Loud sounds of scraping could be heard in the room as Sam pulled the camera lens back down to the floor, his eyes widening as the nail that was once functionless had now formed into a new purpose. A huge heavy rounded hunk of keratin sat on the end of Ben’s leg, it continued to grow larger and longer and it seemed to grow into a rounded semi-circle shape. Ben couldn’t help but blush as he continued to slap his cock against his chest, as he rather enjoyed the feeling of the creaking nail growing out from both his new hind legs. Soon enough the nail started to curl around the flesh of the growth that had been his toe, the top formed a lip around the nail and the bones cracked and popped into position as Ben shifted his weight onto the new nail. The sound of two heavy horse hooves sounded in the apartment, as the changing human moved all the weight of his backside onto his two new horse hooves. Ben flicked his tail around happily as his hind legs continued to change; his femur shifted upwards rather violently into his pelvis, the sounds of cracking bones could clearly be heard from both Sam and Ben. The noise was both somewhat cringworthy and pleasing, like the sound of cracking knuckles it may sound unpleasant, but the relief it provided was highly pleasurable. His buttocks and flanks became a little bigger as the Skeleton of his lower body reconfigured to suit an animal that stood on four legs rather than two, loud sounds of popping sounded in his rear as the his now short human femur disappeared into his lower body.

“Oh wow Ben…this is going well; does it feel good?” Sam said as he gently rubbed his hand across the tight muscular hide of his friend’s flank, watching his tail flick back and forth while the skin of his legs blackened into he same animalistic pigmentation. Short black hairs tingled over his flesh and spread down his legs towards his hooves, the fur seemingly growing a little longer as it reached the nail.

“Ughhh…feels so g…good” Ben groaned back as the sensations of tingling fur spreading over the rest of his lower body made him realise he was halfway there, and things were only going to get better. Sam nodded and patted his side, watching with fascination as his belly began to slowly grow next, as if the changes were spreading up his body. It was at this point Ben felt that same transforming heat moving through not just his belly and chest; but down into his hands. He looked down at his lower arms that rested on the table and shifted his weight upwards, moaning deeply as he felt his belly get larger and heavier. Loud sounds of popping bone and cracking cartilage could be heard from his spine; he responded by arching his back down and pressed his hands against the counter as his upper body was slowly pushed forwards. Ben continued to willingly slap his cock against his belly in pleasure, until his spine had lengthened so much it was no longer able to touch his chest. Ben shifted his weight backwards and sniggered at the sounds of his heavy clopping hooves, grunting and starting to pant deeply as the changes spread to his chest and arms. 

“I….i think my hands….Oh god yes” Ben gasped and panted loudly, signalling Sam’s attention over to his fingers. Sam wore the same expression of confusion as he moved the camera over to his fingers, watching as the nail from the middle finger started to grow larger.

“So soon?” Sam said as he watched Ben’s expression change from shock to gleeful giddiness, a signal that his hands were about to shift next. It was odd that the change hadn’t taken his chest first, usually it would work around the body, but it seemed to have other plans for the giddy half-human. Ben felt a rather apparent stiffness developing in his fingers and hands, within an appendage designed to move around; not being able to articulate his digits felt alien and rather scary. Sure enough he watched his thumb, first, ring and little finger slowly start to shrink, and all the while the mass they lost was added to the expanding middle finger. 

“Ahhhh OhhHHH!! AHHHH FUCK…..URGGHH MORE!!” Ben suddenly panted in shock before shouting loudly in as his shoulders violently popped into place, his arms cracked loudly while his hands continued to transform before his very eyes. The feeling off such sudden and jerking skeletal changes was actually quite arousing, it was a sign he was becoming less human and more beast; and he never felt any pain from it either. Ben could feel the sagging weight of his swelling belly getting to be more of a burden, the weight that he’d gained was dragging down and he had a burning desire to stand on four hooves. His heartbeat began to race as the transformation began to ravage his ribcage, his breaths began to increase and get deeper as his chest expanded, and the sounds of cracking bones could be heard and felt within his body while his organs also started to grow. 

“MMmmmmoooooore!” Ben moaned loudly in gleeful realisation that his hands were changing at a greater pace than his chest and torso, wanting nothing more than to stand upon his soon-to-be forelegs and whinny loudly at his new beautiful black equine form. He begged for more, demanded his changes progress; and sure enough his remaining digit that housed his huge nail swelled up to the size of his entire arm, the shape of his hand slowly disappearing behind swelling muscle and warping flesh. His arms also bulked up with new heavy muscle mass, the skin stretched apart as more strong tissue developed underneath, while the bones in his hands started to fuse together like his feet had done before. He knew what it all meant, that his hand would become his lower foreleg, while his lower human arm would become his upper foreleg. His upper arm had already started to slowly shift upwards, the bones occasionally creaking and jerking into new positions as the ligaments and muscles rubbed over the joints and grew larger and longer to accommodate the growing mass of his huge equine form. His belly swelled up even more, fur started to spread upwards toward his shoulders and covered his lower body entirely while spreading up his now much larger and longer midsection.

However amazing his expanding belly felt his attention was purely focussed upon the changes to his hands, watching with exited glee as the nail that tipped both his arms slowly grew out of his flesh like hardening putty through a mould. The digit that’d been his middle finger had grown large enough to support his weight, and the expanding nail was dense enough to stand upon. Sam slowly backed away from Ben as he saw him shifting his weight away from the window, realising that he’d almost run out of room in their shared accommodation. Sam backed up against the wall and got a good shot of Ben’s upper body, his lower body now large enough it seemed to fill a good portion of the room. The camera continued to record the changes that seemed to be ravaging his upper body, while the bones in his arm continued to pop and snap into place. 

Ben scraped his lower arms against the wooden cabinet, his huge nails leaving scratch marks on the woodwork and finally he felt his lower body fall towards the floor. Ben instinctively moved both arms down towards the floor and let out a loud grunt, the sound of something heavy slamming against something hard was heard in the apartment. He rested his weight on his proto-hooves, panting deeply as he felt his lower body slowly rising up as his arms and hooves continued to grow. At this point his backside was raised high in the air, with his newly forming forelegs being far too short to match his upper body with his rear. However as the moments passed Ben could sense this changing, his could feel the creaking bones in his deforming arms stretching and expanding while his hooves grew around the flesh of his fat digit that sat on the end of his changing forelegs.

“URghhh more…mmmm…m…more!” Ben groaned loudly between the rather violent cracking sounds as his elbows and upper arms jerked sharply up into his upper body, the flesh stretching apart as muscle and thick far slowly spread over his torso and increased his bodily mass. Ben felt so heavy and strong, so powerful and majestic. He looked down and saw his darkening heavy nails that functioned as his hooves, the shape of which rapidly changed to become the same as the hooves on his hind legs. As the nail curled around and grew out fully, Ben scraped the hoof against the wooden floor, feeling the vibrations travelling up his still growing forelegs. He then felt the joint in his foreleg which had been his wrist pop upwards sharply, locking into a new position which would give it less rounded movement, but more support when running. He moved his newly joined forelegs back and forth and found that it felt similar to a set of human knees, he could move it back a fair distance but the joint wouldn’t allow him to move it like his wrist; it was almost like having his human legs attached to one’s shoulders. This newly configured set of legs was totally bizarre and felt somewhat alien to Ben at first, but as his upper body continued to grow and swell, he knew it was for the best; he’d need to get used to it after all.

“You’re getting there Ben, You’re on all fours now!” Sam said loudly as he watched Ben’s back and shoulders bulk up with rippling muscle and expanding fat, the fur that spread from his belly started to convert the human skin around the base of his new forelegs and around his shoulders. The rush of having such immense amounts of testosterone and adrenaline coursing through his expanding body was utterly overwhelming, and the more he grew the more he felt like an animal; a wild beast that could never be tamed. Ben grunted and let out a deep raspy groan at the vibrations that ran up his spine and forelegs as his collar bone, shoulder blades and ribcage continued to stretch apart. His swelling heart pounded in his chest as it supplied the blood his body needed to continue slapping his thick equine meat against his fat black furry belly. Each breath he took his lung would expand, growing larger and heavier in his ribcage, supplying oxygen to the burning muscles that began swelling out from the base of his neck. He felt his forelegs slowly shifting inwards slightly; his two pectoral muscles bulked up between his long strong equine limbs and pushed downwards with newfound weight. Ben turned his still human head down and watched as the growing fur spread across his legs and down towards his hooves, panting all the while as his ribcage cracked apart even more; stretching and growing to fit his larger more efficient organs. 

“URghgg…nneeyaa…mmy neck!” Ben groaned and growled deeply in a rather odd tone of voice, it was clear from the raspy sounds of his words that his vocal cords had begun to change. Sam felt beads of sweat running down his face as he himself began to feel rather exited watching his friend change, but also the heat Ben produced from his massive body had such an effect on his surrounding environments; that the windows began to steam up from the sweat his burning hot body was producing. 

“Oh god that never stops being amazing” Sam replied as he began to slowly move a little closer to Ben, however he was somewhat apprehensive as he remembered times where Ben had become a little too frisky; and the serum was still active within his blood, saliva and bodily fluids. If he wanted to complete his assignment he was required to at least get footage of a shift, and he couldn’t do that changing into a horse himself. But while the footage was important, he also wanted to comfort his friend as the moments near the end of a transformation could sometimes get rather scary.

“URhggg….yeessss!!” Ben groaned loudly again as he nodded to respond to Sam’s statement, huffing air through his nose instinctively at the sensation of his neck slowly swelling up with new fat and muscle. Sam gradually walked towards his changing roommate and was careful to not get in the way of Ben’s hooves, as he would occasionally move his hooves equine legs while slapping his hard erect horsecock up against his fat belly. It was then Ben let out an odd combination of a human moan and a horse’s whinny at the feeling of his vertebrae extending forwards as new parts of his spine grew into place. 

“URRRRGGhhhh....Nggg…nnneiighhhh!” Ben grunted and nickered loudly, his voice seemed to be shifting between human and equine as his neck grew longer, his grunts turning to harsh raspy equine huffs of pleasure. Sam watched with fascination as his neck began to slowly shift forwards, moaning loudly all the while at the feeling of the stretching muscle and popping bones. Ben took a few deep pants of relief as he felt Sam’s hand gently stroking his lengthening neck, a soothing wave of relaxation washed over him as he started to feel more at ease and less likely to succumb to any flight reflexes. The sounds of popping bones continued to ripple and vibrate through his stretching flesh and growing muscles. Ben loved how it felt when the fat slowly swelled under his skin and the muscle fibres bulked up to make his neck thicker and stronger. He could feel his vocal cords vibrating deep down in the pit of his neck, producing a sound not human, but not entirely horse either.

“NNgg…Nnneeeighh!! Ssso…so close!” Ben said in a rapidly diminishing human voice, his growls slipping into loud equine whinnies of joy as he felt the fur slowly spreading up his now long thick equine neck. He began to slowly step back away from the window and stood in the middle of the room, flicking his tail back and forth while continuing to slap his cock against his belly. He felt so close to orgasm, so close to being complete; but it was like his transformation was edging him. It felt like he was on the cusp of climax, but wasn’t able to cum, it was utterly frustrating but at the same time only heightened the pleasure as his huge horse prostate throbbed deep inside his muscular stallion loins. Precum leaked from his marbled horse cock and splattered liberally on the ground, wetting the fur on his belly with the stinky equine musk. He snorted loudly at the smell of his own pungent fragrance, which only made him want to change more; his very scent functioning as a crude equine aphrodisiac.

“Y…your ears!” Sam stammered as he saw that Ben’s earlobes had begun to slowly change shape as the swelling muscle reached the base of his chin. He watched with fascination as the tips slowly tapered towards a forming point, the actual position of the ears started to change as well, slowly moving up toward the top of his head. Sam began to remember what that felt like, how sensual and amazing it was to have one’s ears become long and rounded, new muscles twitching and allowing for more movement. Sam’s excitement began to show and a slight bulge began to become present within his jeans, a sign of enjoyment that Ben noticed.

“NeeeighhH! Nnggghhh it….it’s not the only thing, that’s…gggrrr..ggrowing” Ben nickered and grunted deeply in his changing raspy voice, looking down towards Sam’s crotch which produced a noticeable blush from Sam in response. As time when on ben found it increasingly difficult to produce human words, able to occasionally fit a few short sentences between groans and nickers, but his neck was far from fully grown. The change had seemed to slow, but he still felt the vertebrae extending forwards as his ears started to prick upwards with newfound growth.

Ben always enjoyed the changes to his face; it was the most recognisable part of him, and the only thing that still remained human on his huge horse body. He could feel a slight creaking sound emanating from his earlobes as the cartilage changed shape, while both ears moved up his head and grew towards the ceiling; the shape and size slowly becoming less and less human. He could feel the subtle vibrations running through his head as his entire skull began to shift to accommodate the new position of his ears, feeling the ear canals slowly moving upwards while new muscles began to swell and pop around the bone into place. The sounds of creaking continued as they stretched upwards, finally reaching the top Ben’s head where they continued to grow and expand, the bottom of the ear folded around while the edges tapered into a flat pointed tip. 

Sam grinned as he stroked Ben’s long strong neck and looked away from his roommate’s longer more horse-like ears, and over toward his fingers, where he began to feel short soft strands of fur pressing out from Ben’s skin, the tips brushing up against his human palms. Sam pulled his hand away as he watched the fur slowly spread up his neck, fascinated by the skin changing colour while the fur pricked out from the surface closely behind. Ben could feel this changing skin as a wave of heat, while the fur growth wracked his neck with sensations of tingling. Ben then detected what felt like pins and needles spreading up from the base of his long thick neck, up to his scalp. This odd sensation was in fact the growth of long coarse strands of dark shiny horsehair, the same kind that grew from his beautiful majestic tail. Ben couldn’t see his growing mane but he could defiantly feel it, how the growing fibres felt flowing from the back of his furry neck, and how the tips gently tickled the skin as they cascaded down over his long slender stallion neck. All these new sensations made him blush and huff loudly as he started to twist his head back and forth; feeling the weight of his new strong muscular body.

Sam moved the camera up towards Ben’s almost fully formed equine ears, they looked rather strange without any fur but that began to change as the skin started to blacken around the base, and slowly started to spread up toward the tip. Ben could also feel a similar sensation of pins and needles as his existing short black hair started to grow longer and thicker, the hairs became coarser and started draping down over his face and the base of his now dark skinned jawline. Sam reached his hand up and gently stroked Ben’s short equine ears, feeling the soft fur spreading over the surface and keeping the video recorder on what he was doing at all times; determined to get the best footage.

“Nnggg..nnneeighh!” Ben grunted and nickered loudly as he began twitching his new ears at the touch of a human, and without much thought pinned them back and moved his head away. For some reason the feeling of somebody touching his ears unsettled him a little, and it was only after he’d moved away from Sam’s hand did he realise he had full control over them. Sam caught Ben’s reaction to this on camera, the moment where his eyes opened wide in both shock and delight, and began swivelling his furry horse ears around, shaking them up and down and started to move his head from left to right in giddy joy. Sam backed off as Ben shook his neck and ears around, snorting loudly as he did so as the instincts that were common for an equine started to take over Ben’s mind, giving his human reasoning far less control over his actions. It was then Ben began to groan a little louder, his voice was still partially as he began to feel his face changing, a flushing wave of heat began to pool in his cheeks and started to forcefully push forwards.

“Urgghhhh!! Mmmmmoore…soo cl…close, nnnnnggg …Nneeeigh!!” Ben grunted deeply as he moaned his final human words, the groans began to gradually shift into a loud whinny as his mouth and nose began to slowly inflate with growing mass. He pinned his ears back, kept his eyes tightly shut and raised his tail high in the air, Sam kept hold of the camera and did his best to keep it focussed on his face. At the same time he reached down underneath Ben’s belly, where the sounds of the slapping cock could be heard. Ben’s eyes suddenly opened up wide, the deep green human irises looked out the window to the university campus below as he felt the soft touch of another against his cock head. Ben stopped moving his cock up and down, and allowed it to throb in Sam’s grip, his entire hand having to work the head alone as his shaft was too big for one, two or even four human hands. Ben’s mind wasn’t prepared for how amazing it felt, how sensual his throbbing stallion meat ached for release in the human’s grip, how shivers of equine pleasure shot through his body at every stroke and touch of Sam’s fingertips. The once beautiful green eyes started to darken; the iris began to expand while the sclera started to push back as his eye sockets expanded with his changing skull. The colour in his eyes began to stain, as if somebody had dropped oil into clear water, a dark brown taint dripped into the lime colours and began flooding the green like spilled ink upon a canvas.

“NNnnn nneeeeighhhhh!” Ben whinnied loudly as he gritted his teeth and closed his changing eyes again, nickering loudly while Sam gently stroked and pressed against the base of his throbbing equine dick, being careful not to get the corruptive cum on his fingers. Ben then felt his skull cracking loudly, the vibrations reverberated back and forth between his ears right into the roots of his teeth. He could feel his mouth and nose moving forwards, while the base of his skull containing his molars began to expand and get bigger. His jawbone snapped loudly and began to move forwards with his skull, the lower set of incisors started to swell underneath his puffing lips, while the canines began to shrink and recede into his gums. The bridge between his eyes started to widen, his eyeballs slowly started to move apart as a consequence as his head started to grow in weight and size. 

More and more of his face pushed out, the feeling of the shifting bone and flesh was incredible, it was like having a pair of burning hot fingers pulling your human features away from your head and reshaping your skull from the inside out. The snapping bones and popping cartilage was totally painless, the only sensation Ben felt was the wonderfully erotic vibrations that shuddered through his skull as his nasal cavity also began to move along with his transforming head. He felt his nostrils widen and huff air through them rather loudly, a sudden rush of air filled his huge equine lungs as the expanded nasal cavity allowed him to breathe in much more air than his human mouth and nose could do combined. 

“That’s it Ben, you’re turning into a handsome stallion!” Sam said as he stroked his roommate’s massive equine prick, knowing that if he turned him on a little more the facial changes would progress faster, his arousal and libido acted like a catalyst for his transformation. Ben could also feel his lips puffing up with new flesh, most of which was fat but a few new muscles and ligaments began to form around his maw. Ben’s eyes moved apart even more, the straining groans of his voice became even more equine and soon he sounded nowhere near human anymore, only the deep huffs, snorts and nickers of a purebred stallion could be heard.

“Nggnneiigh” Ben nickered and grunted deeply as he began to feel his prostate throbbing inside his huge equine loins, knowing full well he was close to climax; and he would soon get his first taste of a stallion’s orgasm. His head continued to change even more, his eyes pulled apart by his expanding forehead and nasal cavity; until his tightly closed eyelids were sat mostly upon the side of his head. Ben could felt the burning sensation of his tongue stretching forwards as his face grew out, the muscles lengthening as new ones formed within the base of his maw to provide him with a nice flat tool to lick his nose with. At this point his upper lip and nostrils started to merge together, the shape and function changed as his upper set of incisors started to becoming wider, extending downwards from his gums and pushing his lip forwards. His already widening nostrils began to pull apart from one another, the cartilage in his now long face popped and shifted into a new configuration while the flesh curled around into a rounded circular shape. More and more his face grew, to Ben it felt like his face was a mile long, but in fact from Sam’s perspective he was almost complete.

Sam could see his rounded equine nose and lips, he watched and smiled as his lips swelled up and puffed out into the recognisable maw of a horse. His jaw had followed suit with his skull and a long slender equine muzzle was the result. His eyes had almost fully moved to the side of his head and only the fur stood between Ben and total stallion-hood.

“NNggg!!” Ben grunted deeply as he felt the final changes grip his face, a pressure building up in his nose as the final transformative stretch begin to take place. Without much warning or grace, Ben suddenly felt himself climax, a reaction which caused him to open his now huge brown animalistic eyes wide and jerk his hips forwards. Sam felt his hand slide down Ben’s cock as his mind flashed with thoughts of a beautiful mare, shooting his seed deep inside her and planting a foal within her womb. His tail flicked upwards and exposed his massive throbbing anus, his giant black balls jerked upwards as he felt cum rushing through his cock.

“NNNNEIIIIGGGHHHH!!!!” Ben whinnied loudly as he scraped his hooves back and forth, his cock slapping up hard against his belly as streams of thick white ropey cum erupted like a firehose from the tip of his marbled horseprick. His hips thrust forwards as if he was mounting a mare, his powerful muscular flanks wobbled back and forth as he pulled huge volumes of air through his nose. He turned his flexible top lip upwards and whinnied even louder, taking in all the smells into his nostrils as his mind swam with powerful new odours and sensations. Another powerful pulsating orgasmic wave pounded his loins like a dump truck crashing into a brick wall, his huge round equine eyes looking out in absolute pleasure. His pupils had also changed shape, where they’d once been round black dots, they’d now become long dark rods; while the white of his eyes could no longer been seen behind his hazel coloured iris. The fur spread down his long strong slender muzzle as even more vicious filly batter spurted from his horsecock, spraying the floor and his legs with the stench of his maleness. Whinnies filled the room as the final parts of his face were covered with fur, the last remnants of humanity taken covered up with dark black animal skin, the hair of his moustache and beard fell away from the changed fuzzy equine lips; leaving a fully changed black stallion standing where Ben used to be. He sniffed the air with his sensitive nose and upturned lip, smelling his scent as it turned him on even more, arching his head up and flicking his tail as she slammed his foreleg against the floor, a huge clopping thud shook the floor. 

A loud pop sounded from Ben’s nose as the final piece of his skull shifted into place, the sudden shock of orgasm began to die down and his body began to steam as the sweat rapidly began to evaporate from his fur. He grunted and snorted massive amounts of oxygen and carbon dioxide through his nose, nickering softly as Sam fell back in amazement against the opposing wall, his video camera catching Ben’s beautiful equine body in all its glory.

“H…how does it feel?” Sam said with a nervous face as he turned the camera towards Ben’s long dumb looking stallion muzzle, his neck arched down towards the ground as he stood exhausted from the ordeal of transformation, his nose just touching the cum stained floor. Ben took a few more breaths before gently nodding his slender equine face, pricking his horse ears upwards and flicking his tail back and forth as he finally caught his breath.

Sam stood up and walked towards Ben’s huge sweaty furry horse body, his hand pressing against the soft fur and muscular flesh underneath. Ben’s breaths began to deepen as he relaxed, turning his neck and head around to gently nuzzle against Sam’s entire torso. He’d grown so big his whole head was large enough to hug, though Sam gave him a pat before backing off as he still had the camcorder; and horses didn’t often understand their own strength. Ben began slowly padding over his clothes and pressing his hooves against the floor, the hard nails scraping against the surface and making rather loud clopping sounds.

“Heh…gonna take you a while to get used to it. Ok…well that was Ben under the effects of Serum HS7582, the effects have been recorded and a full review of the formula’s mechanism on cellular structures and chromosomes will be written up” Sam said before speaking into the camera in a rather official voice, his own brow had beads of sweat dripping down his head, before pressing a button the device to stop the recording.

“Well that’s one assignment done!” Sam said with a smile as he patted Ben’s neck as he turned his body around fully to face Sam, his huge brown eyes looked back as he gently nodded back, grunting a little as he realised he could no longer speak; at least until the serum wore off.

“I think we have bovines next, then a few others before we move onto Ursines” Sam grinned as he threw the video recorder past Ben’s face and onto the soft bed, rubbing his hands together to get rid of Ben’s sweat and dander he’d produced from his change. He smiled at the huge horse that now stood in his dorm room, sighing to himself as he realised he’d have to get Ben some food.

“Urgh I suppose you’re hungry” Sam said as he looked back into Ben’s big animal eyes, a question which only produced a rather exited nod from Ben.

“Where the hell am I supposed to get hay from at a university…I suppose carrots will do” Sam said to himself as he looked over to see where he’d kicked his shoes when he came in, and sighed as he saw them over by the door, stepping over the piles of messy clothes to put them on.

“I swear this isn’t fair, you always get to be the subject and I godda get you food ‘cos you keep losing the…” Sam said before a resounding “CRUNCH!!” was heard in the apartment, a sound which caused Ben to flick his ears upwards at, looking down at Sam’s foot.

“…vials…” Sam continued as he looked down at his foot, feeling a shooting pain in his sole and realised he’d just stepped on something within the pile of clothes. He pulled his foot up and saw a large shard of glass sticking out his bottom, blood dripping into the sock and staining the fabric. Sam quickly grabbed the glass and pulled it out from his flesh, grunting loudly at the pain before realising it had some purple liquid on it.

“GOD DAMMIT BEN! This is like…the fifth time now, I swear you do it on purpose” Sam said as he threw the glass down onto the floor and turned around towards Ben, clearly his reaction was evidence that this wasn’t the first time it’d happened.

“Urggh…Ah well at least I’ll get to go full stallion like y…you. Um wait…what” Sam said as he felt the flushing heat pool through his leg and began centring in his crotch, his sentence stopping as he felt something different, something strange. The serum had never travelled so quickly to his crotch before, it was only with other types of serums it affected genitals first.

“What what….no what!?!” Sam shouted as he began to panic, reaching his hands down to quickly undo his jeans but before he could undo the zip he fell down to his knees in a sudden wave of sweet agonising pleasure.

“Ohhhhh fuck….Ben! Those were two males…right!” Sam shouted loudly in pleasure at the feeling of shooting orgasmic sensations from his crotch, while Ben simply watched his friend fall to the floor, clutching his crotch tightly. Suddenly his nose picked up a new smell, a smell that began to make his cock harden in response, a scent he instinctively knew. His eyes widened as he remembered what the second serum was, what he’d synthesised it for but had lost, until now.

“Ben what…Ugggghh….oh god!” Sam shouted before moaning loudly, a wet patch started to develop on his jeans, the bulge from his cock he’d had before started to disappear while another growth began to appear underneath his crotch, between his legs. Sam pushed a hand down under his jeans and pants, and a loud wet slurping sound could be heard, and a powerful pungent odour of a female horse filled the room as Sam pulled out a finger tainted with wet slick female fluids. He pushed down his jeans frantically, pulling down a wet pair of pants and looked between his legs.

A large throbbing black mare pussy sat between his male human legs, leaking slick fluids onto his jeans and over his undergarments. Short brown fur began to sprout around his crotch and slowly started to grow down his legs. Sam gasped as he felt a nub of flesh forming at the base of his spine, pushing out rather quickly into an extending equine tail, long black hairs pushing out from the skin at a shockingly quick pace.

“Fuck…” Sam said as he looked up to Ben, seeing the deep lust in his eyes as he caught the scent of Sam’s new thick black mare pussy, a long equine tail flicked up underneath his t-shirt as he instinctively raised it upwards to reveal his swelling anus and dripping mare sex; the scent of the stallion began to turn him on too. Thanks to Ben it would seem that their assignment was far from over, and Sam had gotten some extracurricular activities to indulge in.

A loud pair of equine whinnies could be heard throughout the campus that night, along with roars, moos and many other sounds of animals enjoying themselves as they endeavoured to complete and pass their assignments, just like Ben and Sam had done.