“All right class, settle down…” the tall mare said, a clear and gentle tone that nevertheless immediately silenced the din of excited pubescent chattering. 
But she knew it wasn’t really the tone, but rather the entrance. The kids had been allowed into the sex-ed classroom while she got ready in the little attached dressing-room, and had plenty of time to poke around the strange room. Not a single school desk in it, but plenty of beds, ottomans, beanbags and a few padded benches. They’d have heard rumors, the strange setting would spark imagination, and the sight of a tall, leggy mare walking in wearing nothing but a dressing gown would snag the attention of every boy and girl in the room. Especially the boys.
“Hello class, my name is Sylvia Velasquez, but since you’ll be seeing a lot of me during this week you can just call me Sylvia. For the duration of this week you won’t be having any of your regular classes. Instead you’ll spend four hours of every school day here with me, learning all about sex.” She said, and kids being kids waited for a few titters to subside.
“Now I know you’re not little kids and that you’ve been taught about the birds and the bees. But in these classes you won’t be looking at diagrams…” she said, deftly undoing her belt and shrugging her robe off in one practiced motion. The last of the titters died immediately. “Now boys and girls come in all different shapes and sizes and all of them are fun in their own way, but it means you have a lot to learn if you don’t want to wind up embarrassing yourself, letting someone you like down, or even getting hurt. Now I see a lot of cute and varied boys here, and since the anonymous survey you were given indicated that they all like the idea of being with a girl, they will be helping me demonstrate the various ways to make yourself and your lover feel good.” She said, moving her gaze from one adorable young man to the next.
“During these first few days I’ll expect the girls to pay close attention, because after that we’ll be pairing you up into groups of two or more and you’ll all be expected to put what you’ve learned into practice. Now we did have a few girls state that they aren’t interested in boys… nothing wrong with that, of course. A senior girl will be around any moment now and she’ll be showing you ways how females can have intimate fun together. But were going to start this day like every other for the next week – by you all taking your clothes off and putting them away nicely folded in the cubbies over there…” she said.
And while the kids obeyed, she kept a close eye on her class. This always gave her a good idea of what she had to work with – which of them are so eager they were losing buttons, which of them looked a bit shy at the thought of being naked in front of their classmates, a few that were trying to shrug their clothes off without taking their eyes off her for a second…
“There we go… ooh, I see a lot of you are eager to learn.” She cooed, getting a laugh but noticing that even though some boys were a bit embarrassed at being called out for sporting stiffies, none of them were trying to hide their young erections. A few even seemed to be posing. “Now since you boys will be helping me demonstrate, I’m going to have to ask you not to cum unless I tell you it’s okay. You do that, and I promise I won’t send any of you home with blue balls.” She said, getting giggles from the girls and promises from the boys. “As for you girls, you’re free to relieve yourself as long as it doesn’t distract you from the lesson, and you can help yourself to any toy in that chest, provided you clean it properly before putting it back. That means with soap and water, not tricking a boy into licking it clean!” she said, getting another round of titters. A knock on the door seemed to startle them all and Sylvia had to smile at the sight of a few of the shyer ones covering up.
“Ahh Tessa, glad you could make it…” she said, unlocking the door long enough to let a young goat doe through.
“Sorry I’m late teach!” she said, not even bothering to try and hide her eager smile. 
Sylvia had recognized Tessa’s name from the list of volunteer assistants, and knew she’d be the right person for the job. The young nanny had been in one of the first classes the mare had taught, and she remembered how the female assistant had to drag the overenthusiastic young goat’s muzzle out from between her legs after the demonstration was done. There was no doubt she’d be perfect to show the girls who weren’t interested in boys how to have a great time without them, leaving Sylvia’s hands (and mouth and chest) free to deal with the array of eager young males.
Tessa wasted little time getting as naked as the rest of them, and Sylvia saw the eyes of the class go from her to the goat and back again. She supposed they provided quite a contrast, two attractive but quite dissimilar female forms. There was the fur color – Tessa’s was stark white, the same shade as Sylvia’s flowing mane and (for now) pristine tail. But the fine short fur covering the mare’s body was the color of golden cream, and Sylvia liked to wear perfumes with a hint of vanilla on these occasions to accentuate the shade.
But the difference was anything but fur deep. Tessa was toeing the line between a girl and a young woman, and since she was on the volleyball team she had a very trim figure. The svelte body had a pixie-like appeal, and even though the fine muscles didn’t look very cuddly everything about her suggested youthful endurance, from the eager twitching of her bushy tail to the impish sparkle in her eyes.
And even though Sylvia herself was still just shy of three decades, there was no mistaking for anything other than a woman. Her legs were long but not lean, the shapely calves flowing into generous thighs that ended in a rump she knew would bounce a little with every step she took. Her hips flared out, narrowing at the waist for a perfect hourglass figure, especially considering what she considered the crowning glory of her figure. Males of all ages (and more than a  few females) found it hard to tear their eyes away from her breasts even when she was dressed, and without anything holding them in place her luscious mounds hung just far enough for gravity to give them the perfect tear-drop shape. The girls were looking at her with a sort of awe and barely suppressed envy, while the boys stared as if they’d never been weaned!
“Well, looks like we’re all here, so let’s start the lesson. Lemme see… you there, Daniel is it?” Sylvia asked a young malamute.
“Y-yes miss.”
“Would you like to come up here and help me?” she asked, trying not to grin at the eager way the pup trotted up to her, even though he looked a little overwhelmed once he was face-to-breast with her.
“Now Daniel, would I be right in assuming that you’d like to have some fun with me?” she asked, making a point to glance at the slender red rod peeking out from the boy’s stark white sheath.
“Yes teach!” the boy replied, so quickly that the others giggled. Sylvia knew the answer, of course, but asking for consent was a useful habit she wanted her students to form. 
“That’s good to hear. Now as you all may notice, despite the fact it’s just peeking out, Daniel’s cock is already stiff. This is true of all canines – they have a bone in their boner and are never floppy. Normally, as soon as a canine male is out of his sheath he can just slide into a girl and get started. However, since you’re here to learn, I’ll start by coaxing Daniel all the way out…” she said.
It hadn’t really taken much – a few fingers stroking his swelling sheath while her other hand cupped and cradles a white fluffy pouch that looked quite promising. After some stroking on her part and some panting on Daniel’s, she had a respectable six inches of malamute on display for the whole class.
“Now here’s the reason I wanted to start with Daniel here. This little lump at the base of his cock is called a knot. It’s a bit that males of various species have – all doggies, wolves, coyotes and foxes, as well as exotics like gryphons and some draconic males also have them. Now it may not look like much, but by the time Daniel’s ready to cum this thing will swell and swell and swell, enough to get stuck inside a girl. This is to ensure that she takes all of the male’s seed and winds up with his puppies. Not an issue with modern birth control, but it can still be loads of fun. It takes a while to shrink back down, anywhere from ten minutes or even half an hour, so plan your play accordingly. ‘The knot went in’ is not a valid excuse for being late!” she said, getting a few giggles even as she began to stroke the now exposed canine length.
“Now while I’m stimulating Daniel I want you to keep a close eye on his knot. Can everyone see it? Good. If you need to, don’t be shy about coming in closer for a better look, we’re all here to learn.” She said, her hand moving with practiced ease, the fingers clenching and relaxing as she milked the panting pup in front of the class. Glancing off to the side, she could see Tessa in her corner, standing with her legs wide apart and her young pussy exposed to a handful of wide-eyed girls as she explained what’s what.
“See that? And it’s still not fully swollen… “ Sylvia said as the boys and girls who’d never seen a  knot stared in awe at the two lumps at the base of Daniel’s red rocket. “Now, like cocks knots come in all sizes, but at their biggest they’d usually be the size of their owner’s fist.” She said, smiling at the few shocked gasps from the staring girls. “Now if any of you girls want to try a knot but are nervous about having it fit, just make sure it goes in early. They are easier to take if you let them swell up inside you.” She said, polishing the red rod that was by now leaking all over her hand, making every stroke nice and slippery and making the canine boyhood glisten.
“You don’t have to take it, of course, but canines knots are the most sensitive part of cocks like this one, so you have to give your male a bit of special attention to help him cum. You’ll notice that even though Daniel’s panting, staring at my breasts and enjoying my stroking so much his hands are balled into fists, he still hasn’t been able to cum.” She explained, as everyone took in the sight of the young malamute standing rigid and obviously tense. “But now pay close attention to what happens when I show his knot some attention…”
Just as she said it Sylvia moved one hand from the boy’s sack and used it to grasp the swollen bulge at the base of his cock. The effect was immediate, with Daniel grunting as he bucked up into her grip, her other hand now staying still and just squeezing the red rod throbbing in her grip. She heard the gasp of both boys and girls as the red lump grew so big that even a fully grown mare couldn’t close her fist around it, the boy’s sack lifting and starting to twitch just before the tip erupted in a spray of thin canine cum.
“And there we go! Now since canines are meant to tie they also cum for a long, long time. So is anyone curious what puppy-milk tastes like?” she asked. A grey hand shot up almost at once, belonging to an awed mousette whose muzzle had hung open since Daniel started spraying. “Okay, and what’s your name sweetie?”
“M-Molly.”
“Okay then Molly just come over here. Now try to get your lips around the tip without getting any in your eye… there you go…” she said, smiling as the grey-furred girl latched on to the dazed malamute’s tip. “It’s okay to swallow Molly, no boy’s ever going to complain if you do.” She said after a few shots left the girls’ cheeks bulging. She saw Molly gulp the mouthful down, apparently enjoying the taste enough that she kept her little muzzle on the tip, nursing it as Daniel struggled to get his breath back.
“There you go. Now just put your hands on his knot like this, and don’t be afraid to squeeze. Now since Molly has been so nice to take Daniel off my hands… “ the mare began pausing for the giggles to die down. “… we can all move on. You would be… Ike, right?” she asked, meeting the brown eyes of a young jack.
“Yes teach.”
“Well come on over, I won’t bite. Which is very fortunate since we’ll be moving on to fellatio.” Sylvia said, eyeing the young donkey’s package as the class tittered. “Now class, you’ll notice that even though Ike can’t take his eyes off me…” she said, squeezing her breasts between her arms just a little for emphasis. “… he isn’t quite as rearing to go as most of you.” She finished, pointing out several floppy inches hanging from the jack’s thick, hairless sheath.
“Now this usually means one thing. Ike, are you an only child?” she asked.
“No miss.” The boy replied. So it’s not a ‘mommy’s little treasure’ situation… the mare thought to herself before asking her second question.
“So you have a sister? An older one?”
“Yes Miss Sylvia. She’s a high-school senior…”
“And would I be right in assuming that the two of you had some fun this morning?” she asked coyly. When the boy bashfully stared at his hooves even the other kids knew the answer, as evidenced by the hoot they gave their classmate.
“All right, settle down everyone. Incest used to be a big taboo back when contraceptives were awkward and flawed, but these days it’s not uncommon for someone your age to get their first taste of sex from a sibling or parent.” She said, putting a hand on the plump equine sheath and smiling as the blunt tip emerged instantly.
"Now you'll notice equine's work a little differently than canines. Remember that a male gets hard because his body forces blood into the penis, making it grow and become hard. It basically inflates, so the bigger it is, the more work the body has to do. After all, blowing up a balloon is easy but it takes more effort to blow up a pool float, doesn't it?" she asked, her hand moving expertly over the still flaccid length of tumescent flesh spilling from the jack's sheath. She suppressed a smile at the way the expressions on the faces of the non-equine kids changed as they watched the floppy member begin to swell and grow firm. And once it was hard enough she took her hand off it, with the kids gasping at the equine cannon now standing perpendicular to the young donkey's body.
"Now since I'll be demonstrating oral I won't be able to speak, so there are a few things I want you to pay attention to. First of all, be sure to keep your teeth out of the way. Second, when you have a male as well-endowed as Ike here, you'll need to be patient if you want to take him all the way. It is possible to take a boy's cock into your throat, but it takes patience and practice. Just try to fight your gag reflex and take deep breaths through your nose. Ike will be flaring up before he comes and during that time my air passage will be blocked. It's important not to panic when this happens, since flares don't last as long as knots. Just take a deep breath when you feel it growing and you'll be fine. For you girls, be sure to get creative with your tongues and to gently suckle on your lover. And you boys need to make sure not to get carried away. Some girls might be fine with you gently sliding your cock in and out of your muzzle, but you need to slow down if it looks like she's having trouble keeping up. And now that we've got that out of the way..." Sylvia said, gently griping the eager jack just above his medial ring before pursing her lips and pressing them against the blunt head. Even though he'd had some fun this morning the young colt seemed to be almost trembling with excitement as she made sure to tease him a little, kissing his cockhead as she looked lovingly up at him.
The whole class joined the jack in his gasp when her muzzle opened, her lips parting as she easily took the admittedly sizable equine cock into the warm, wet confines of her mouth. She only took a few inches at first, her tongue twisting around the still un-flared tip as the jack's whole body tensed. Sylvia doubted that the boy's sister had her skill and experience when it came to sex, and the mare was particularly proud of her oral skills and the adorable faces it could cause young boys to make.
She made a point not to stroke his shaft but couldn't resist reaching out with one hand to fondle the swollen hairless pouch holding the jack's family jewels. Emptied mere hours before, the pubescent equine's orbs were still wonderfully hefty in her cupped palm, a promise of a copious load of equine spunk as a reward for her efforts. The thought of the young donkey spurting was enticing enough that Sylvia found herself pushing her lips forward, cradling the underside of the equine shaft with her tongue as the hard length slid deeper, soon reaching the back of her throat.
Following her own advice the mare took deep breaths through her nose, her ears catching the collective gasp of awe as they saw her creamy-yellow throat subtly distend as the fleshy spire began to slide down it. Her ears twisted to catch the sounds of girlish squeaks behind her, the mare guessing that her assistant had begun her own oral demonstration on some young thing that obviously hadn't felt a tongue on her budding young sex before. The pitch of the girl's cries were a testament to Tessa's enthusiasm, and she knew despite the fact the lesson wasn’t meant for them, more than a few boys would be glancing at the girls’ end of the classroom.
Well, it was hard not to enjoy this sort of work. There was something so endearing about these innocent boys and girls, and she included the donkey gasping as her lips touched his sheath among them. After all, a bit of fun and games between siblings or even a parent was one thing, but this would be a week they would remember for the rest of their lives! She could feel the eyes on her, and could see a few muzzles open in disbelief as she moaned sensuously around her mouthful. And the awed collective gasp as she slid her muzzle off the young jack, her full, pouty lips clinging to the now shiny length, the nipples on her heavy breasts hard and betraying how much she was enjoying the lesson.
Back and forth as she moved, nostrils flared to take in as much air as she could get while the meaty length of the young donkey plunged in and out of her throat. She moved her hands along the boy’s thighs, going ‘round them and laying her palms against his firm young cheeks. This leverage allowed her to move the jack’s hips as he looked down at her with wide, sparkling eyes. Sylvia made sure to take her time with him. After all, she was surrounded by eager young males, a ring of stiff cocks of all shapes and sizes and a lot left to teach them. Even though she was young, she knew even her endurance had limits, and she’d be pushing those limits during these first few days.
"There it is! Look!" gasped one of the girls, pointing at the bulge the mare could feel forming in her throat.
Her young lover was reaching his peak, and following her own advice the mare took in a deep breath while she still could. With every throb of the meaty shaft the flare grew bigger, and knowing what was next Sylvia pushed her muzzle into the gasping boy's crotch, her grip on his buttocks keeping him in place as his sack rose and twitched just under her chin. With his cock this deep she didn't even have to swallow. She felt the equine cock swell with every rope of cum that traveled along it, the jack's pert butt twitching as his body worked to pump his load down the gently moaning mare's gullet. As she took the boy's load, Sylvia could feel her own sex grow wet but she kept her hands on the jack's tush. After all, her slit would soon get all of the masculine attention it could possibly desire, so why bother with her fingers?
The rock-hard donkey rod gave a few last throbs before it began to grow soft, and Sylvia moaned as she took her muzzle off, savoring the taste of the trail of equine spunk the flared tip leaked on her tongue before it slipped out. There was a gasp of surprise when her students saw the size of the trumpet-like tip of Ike’s cock, the sheer weight of the flare making the boy’s cock hang like an exhausted python between his skinny legs once she released it.
“Now I know you couldn’t really see it, but Jack just pumped quite a big load down my throat. These days sexually-transmitted diseases are a thing of the past so it’s safe to swallow sperm but remember you can still choke if you aren’t careful. If you can’t take everything a male has to give don’t dawdle and pull your mouth off him. Boys like it when you swallow but they also like the sight of their stiffies pumping white ropes over a girl’s face or chest. And a nice pearl necklace can make a girl feel very sexy, something which I’ll show you tomorrow when we move on to boob-jobs.” She said, her ears catching a few disappointed moans. There are always a few, especially since the two heavy globes gracing the mare’s chest were the stuff of pubescent dreams.
“Now, now, I see a lot of fine young shafts I’d love to let hump my cleavage…” she said, making a point of hefting her bountiful boobs and pressing them together. “But being surrounded by so many handsome young men has taken its toll on me…” She said, getting up on her hooves and standing with her legs wide enough apart to give everyone a good look.
“Since it’s easy to spot when a boy’s eager for sex…” she said, running her eyes over the various erections and getting a giggle from the girls. “… let’s see how a woman’s body signals arousal. Don’t be shy now, get in close for a good look and a good sniff. Since my fur isn’t very dark, you can see how the pale-yellow around my sex looks a little pink, and how my outer lips are just a little swollen. This causes them to part just slightly and give a male a glimpse of what’s usually hidden between them.” She said, and once she was sure all eyes were on her sex she slid a hand down and pulled her lips open, the boys gasping when they saw the mare’s glistening pink flower on full display.
“See, this is why girls make boys hard, and boys make girls wet. It’s a sign that my body has prepared itself by making my pussy nice and slick for the lucky guy that gets to go in first. Let’s see… how ‘bout you? William, right?”
“Uhh, everybody just calls me Bill…”
“Oh, Bill the bull?” the mare teased the bashful looking young bovine with over seven rosy-red inches sticking up out of his fat sheath. “Well Bill, if you’d like to follow me to the bed over there you could help me with today’s main lesson…” she said, turning with a flourish of her snowy-white tail, hearing the click-clack of cloven hooves as (along with the rest of the class) followed her.
“We’ll be going over a lot of different positions to have sex in, and places to have sex on. I’ve noticed quite a few of you eyeing those special swings, and rest assured I’ll show you how those work soon enough. But for starters we’ll go with something nice and simple – missionary position on a normal mattress.” She said, getting into bed with her head braced against the pillows piled against the headboard so that she was looking at her class rather than the ceiling. “Bill, come on up and join me. If you keep me waiting, I might decide to choose another boy to help me…” she said, doing her best not to laugh as the bovine boy clambered into bed. 
Even though young he was quite well built, and would no doubt be a powerhouse of a bull once he really hits his growth spurt. As he shyly crept up along her body Sylvia welcomed the weight of him on top of her, feeling a substantial amount of muscle that the last lingering layer of baby-fat was just barely concealing.
“All right, now everyone get close to the action so you can see what’s going on. Now a good thing about bovines and cervines is that their shafts end in a tapered point that gets gradually thicker. That means that there’s never any trouble getting it in, but you girls need to remember it does get thicker, so don’t get carried away. If you pay close attention to the action down there, you’ll soon see what I’m talking about.” She said as she helped Bill get comfy on top of her. His hips were still a bit further back so he was now face to face with her bountiful bosom. Since his mother’s a cow the kid would have grown up around a big-busted woman, but the two massive mounds the mare was sporting had the kid’s eyes glued to her chest.
“Okay sweetie, I’m ready for you to push in. Just a little lower and… there we go!” she said, her voice as sweet as syrup as she felt her dripping lips grab hold of the slender tip of the bovine cock. On reflex, the bull bucked enough to send about two inches sliding into her, not enough to really give her a thrill but enough to make sure he wouldn’t slip out. “Ooh, there’s a good boy. Now just climb up a little higher…” Sylvia cooked, coaxing the young bull to get more of that hot, steely beef-stick into her quivering sex.
“Due to the size difference, I have no problem supporting Bill’s weight…” the mare explained, her voice taking on a fluttery tone as her marehood molded itself around the long-awaited length of boy-cock. “…but some of you bigger boys need to support yourself on your hands or elbows when you’re on top. Okay, now I think I’ve got about five inches of Bill inside me, and there’s a lot more to come, so as long as I’ve got your attention we can get started…” the mare said, taking hold of her young lover’s chin in one hand as she raised his muzzle up out of her cleavage. 
It took some effort but her long equine neck could bend far enough for her to bring her lips to Bill’s, the mare feeling her young lover tense up as she gave him what she suspected was his first kiss. She heard several girls gasp at the sight as her mouth opened and her tongue slipped into the surprised bovine boy’s mouth. The concept of a ‘first time’ wasn’t as big a deal as it used to be in the primitive times when young people were encouraged not to have sex until they were married, but Sylvia still found something romantic and endearing in the act of a boy surrendering his virginity to her, enough that he always made sure to make the little guys’ first times memorable.
Bill wasn’t much of a kisser, of course, but the young bull did seem to be enjoying himself. He climbed a little further onto her, just an inch or so but enough to press the opening of his sheath against her folds just as his hands moved to her pillowy breasts. Like a lot of young boys entering a woman for their first time, he was content enough to just stay hilted inside her and savor a dripping equine honeypot caressing his length as he played with her majestic mounds.
Sylvia gave him a little time to adjust to being inside her, but after she decided he’d had enough she broke the kiss and began to gyrate her hips. She saw the bull’s eyes briefly lose focus as he realized that as good as it felt to be buried in a sexy mare, friction was better. He began by just grinding against her, the stiff, smooth length stirring the mess inside the mare’s love-tunnel and drawing a soft and honest moan from her muzzle.
“Go on Bill, you can go harder. I’m big enough to take anything you can give me…” she husked, the bulls ears flicking at the sound of her voice.
Sure enough that was all it took. She felt the young body on top of hers shift, the muscles tensing as Bill instinctively sought a position that would give him more leverage. As always the mare made sure to be vocal since a bit of moaning and gasping always made the boys mounting her give her their all. She heard other voices soon enough, the gasps of both girls and boys as the keen eyes focused on the action caught sight of the bovine rod slipping in and out of her.
“See girls? Tha-ah!-t’s what I meant. The bovine ti-eehhh!-p is slender but it gets very thick at the base…” she said, doing her best to keep her voice steady. Not an easy task now that Bill was really getting into it, or more to the point into her.
Sylvia threw her head back and let the boy huff into her cleavage as his body shifted on top of hers with every buck of those powerful bovine hips. Bill was quite well endowed, and although he couldn’t really stretch a grown mare like her out Sylvia didn’t miss the way his tip was just barely grazing her cervix every time he pushed all the way in and those hefty bovine nuts slapped against her cheeks.
“You’re doing –ngh!- great Bill. Just try to last as long as you can, okay sweetie?” she said, getting a nod from the young bull before he buried his face in one of her breasts and closed his mouth around a stiff nipple.
She knew he wouldn’t last long, but she suspected he’d make it close enough. The mare did her best to work herself up, throwing her mind into the sensation of mating with this lovely and no longer innocent boy. On one side the young bull looked adorable as he pressed his blunt muzzle into the pillowy expanse of feminine flesh, but there was something masculine and thrilling about the way he was bucking into her, driving his steely length as deep as he could on every stroke.
“Now class pay –nghhhGod!- close attention… you are ab-ahHh!-out to see a f-female orgasm…” she said, losing control of her voice as her body gave in. 
She pressed the head of her young lover into her teat, moaning softly into his ear as her sex began to flex around him, slowly at first but then with desperate clenches as the force of the mare’s climax hit her. She could feel Bill groan into her breast, the young bull’s forceful thrusts growing shorter and losing their rhythm. Finally he gave one final thrust, pushing hard enough to mash his sheath against Sylvia’s splayed labia as he gently bit on the mare’s stiff nipple.
She was still riding her own orgasm when she felt the boy’s body stiffen on top of her, the two heavy bovine testes twitching against her cheeks as his engorged shaft throbbed. The mare could feel him flex inside her, the slim tapered tip now pressed gently but firmly against her cervix, hard enough that she could feel the force of the boy’s orgasm when the first jet of bull-milk erupted from the tip. The implant she had was fool-proof, guaranteeing she would never conceive unless she wanted to, and letting the mare enjoy the sensuous flow of the boys’ seed into her womb. Being a bull – even a young one- Bill had a lot to give, and the pulsing of her honeypot was drawing every last drop in that plump bovine sack. Sylvia just lay back and luxuriated in the sensuous delight of being seeded by the young hung now looking up at her, panting with his face stuck between her two lush mounds.
Bill was either smitten or a big softie since he stayed on and in her until his cock began to shrink and slide back into his sheath, leaving the other boys to nervously shift from one foot to the other, waiting for the next lesson and hoping to be picked to help demonstrate it. And it took that bovine rod a while to slip out, the load he’d pumped up the mare’s still fluttering sex oozing out the moment the tip slipped from between her lips.
“And there we are. Bill was a very good boy for me and managed to last long enough for me to come. Now you boys are all still young so it’s no great shame if you don’t, but I want you to remember that if you got an orgasm your girl deserves one to, so do your best to make it up to her.” She said, the whole class staring between her legs as Bill dismounted and revealed a equine cunny dripping in pearly bovine cum.
“Okay, now I would like to cover something a little bit different, so for my next partner... hmm, how about you?”
“Me?” squeaked a young bunny white and brown bunny, his ears perking up at the idea.
“Yes sweetie. Mind telling me your name?”
“Uhh, Timothy, Ms. Sylvia…” he said, approaching the mare after she beckoned him closer.
"Now, we've seen a lot of very well-endowed boyhoods today, but I don't want you girls to get the idea that size is the key to having a good time with a male. The skill and enthusiasm of your lover plays a big deal, but you always have to think of how to make the most of a cute boy that wants to get intimate with you. For instance, Timothy here is smaller than a horse would be, much younger than I am and completely inexperienced. But he is cute and I am very much attracted to him, so I need to figure a way to make things feel a little more... intense." Sylvia explained, striding over to one of the gym-mats, feeling the last boy's load drip from her folds with every step until she finally got down on all fours. Neither Timothy nor the rest of the class needed to be told to follow her - the kids walked zombie-like, both boys and girls staring at her with their muzzles half-open.
"Now, if one of you will go to the toy chest, there should be at least one funny-looking bottle in there... thank you dear." she said to a raccoon girl that had already dashed towards the big box of sex-toys, brandishing the lube before helpfully bringing it to her teacher.
"Just in case some of you still haven't guessed, I'll be letting Timothy mount my rump..." she said, giving her vanilla-colored ass a little wriggle and smiling at the expression plastered on the bunny's face as his eyes fixed themselves on the equine rump served up for him. "Now not all girls like anal, and it is kind of an acquired taste. But as long as you don't bite off more than you can handle..." she said, waiting for the giggles and a few winces to die down "...and you take things nice and slow to start with, it can be every bit as thrilling and satisfying as taking a male vaginally. Now to start with I'll ask Timothy to help me out by lubing me up..." she said, popping the cap from the bottle and revealing a slim applicator. 
"Just a little bit, mind you. I know you think more must be better, but if you overdo it you'll end up making a mess as well as a lot of embarrassing noises." she said, relaxing her pucker as she felt the applicator touch the pink ring under her flagged tail. She could actually feel the way the bunny's paws were trembling as he pushed the tip in, and to his credit all she felt was a little bit of the cool goo squirt into her before it was pulled out. "There's a good boy. Now feel free to rub some on yourself. While he's doing that, I want you girls to focus on my posture - Timothy is much smaller than I am, so I'll be doing everything I can to take everything. A doggy-style position is a good start, but you have to make sure to arch your back and thrust your rear out like this." she said, doing just that and hearing the awed gasps of the kids. "See what a difference that makes? How my cheeks are now spread wide and how my pucker is on full display. And by parting your knees you can lower yourself at just the right height. Handy of your lover is kneeling behind you, but since Timothy will need to stand to breed my rump, I will be keeping my knees pretty close together. Timothy, you can now come up and enter when you're ready."
There was a hushed silence if you didn't count the slurping noises from the other end of the room. Tessa was laid out on a bean-bag with a pretty young heifer laying on top of her. Both of the girls had their muzzles buried in each other's crotch, their slurps seeming obscenely loud in a classroom that had otherwise fallen silent.
Sylvia took deep breaths, forcing her body tor relax and to ignore the instinct to clench up when the lapine tip pressed against her gooey ring. Her pucker gave only the briefest of winks before relaxing enough to let the boy wedge the tip of his head in. Whether it was awe or obedience she wasn't sure, but Timothy was going nice and slow. Not that she really needed him to, but after all she was here to teach the girls and boys how to do things right, and nothing could turn a person off anal faster than having a cock jammed suddenly under their tail. Although Sylvia doubted the slow and steady pace would last. She'd chosen a rabbit for the anal lesson for a reason, and she knew her students would be treated to an impressive show once the bunny's instincts kicked in.
"Mhhh, that's it Timothy, just slide it all the way in..." she cooed, her ring pulsing a little around the length sinking into it, enough to make her young lover gasp. "This is the way to take a boy under your tail girls - deep breaths, keeping yourself as relaxed and loose while he pushes in. Of course once he's in it can be fun for everyone involved to clench up a little, like this..." she said, smiling at the gasp she coaxed from the bunny as her ass tightened around him, the trapped alpine shaft throbbing inside her ass as she held him in her grip for a few seconds before relaxing again.
"You'll also notice that Timothy is being very gentlemanly by holding still until I'm ready for him to start moving. So if my young gentleman will place his hands on my rump for some leverage, I think we can get started..." she said.
She could feel the lapine paws trembling as they settled on her perfectly curved rump, the two custard-furred cheeks that were tantalizingly soft to the touch but that would reveal firm muscles underneath if the kid worked up the courage to give them a proper grope.
For now he seemed content to just palm the two equine buttocks, and Sylvia knew that he'd be in awe at the sight of his little hands pressed flat against her curvaceous ass. But he did do as his was told, the fingers tensing against her cheeks as he began to pull out, the whole class obviously staring at the way her pucker clung lovingly to the lube-polished lapine cock. Sylvia gave him a few well timed clenches while he was sliding out, teasing flexes of her ring which she knew would be making the bunny's tail twitch. But she made sure to always relax completely when he pushed in, making sure that nothing got in the way of his young cock sliding as deep as it would go into her tight tail hole. For a while the mare just let the boy breed her butt, making sure to be vocal enough to encourage him to slowly pick up his pace. And Timothy really was a darling, sticking to slow, steady strokes even though she could feel by the tension in the hands palming her ass that it was taking its toll on him.
"Timothy, are you feeling a bit tense?” she asked.
“Uh-huh…” Was the best the boy could come up with as a reply.
“Don’t worry about holding back sweetie. I’m a big girl, I can take whatever you’ve go-oooOOohhh!” the mare began, her encouragement ending in a long, drawn-out gasp as the bunny did as instructed.
Even knowing what to expect, Sylvia was caught by surprise as the lapine hips went to work. She could imagine the boy behind her – standing on those powerful lapine toes, legs tense and his hips a blur as he let nature take over, the jack-rabbit rhythm pistoning his hard young cock in and out of her well-lubed ass. The calls stood with mouths agape, silent enough for the slaps of the vigorous butt-breeding to fill the classroom, along with Sylvia’s moans and the grunts of her lapine lover.
She could feel the repeated smacks of the boy against her, knowing that her creamy cheeks would be rippling from the pummeling her curvaceous rump was subjected to. Such was the bunny’s force that even her heavy breasts were swinging to and fro, hanging low enough for her stiff nipples to brush against the surface of the mat.
Sylvia made it a point to be vocal during class, but she found herself biting her lip, worried she might scare the kids if she really let lose. Which was what the boy behind her was doing. It wasn’t like she didn’t know what to expect, but the energy of the rutting rabbit still surprised her. The violation of her pulsing pucker was enough to pump a steady stream of Bill’s load from her, the bovine spunk dripping messily and staining the small but plump sack hitting her folds with every thrust.
Timothy threw himself on top of her, wrapping his slender arms around her waist as he instinctively sought every bit of leverage he could get, anything to help him drive his cock harder and deeper into the mare’s bouncy behind. Sylvia knew she was quite sensitive anally, especially just after her slit got some lender love and care, and with the bunny’s pummeling of her tush causing the walls of her sex to rub together she had little doubt timothy would make her cum and cum hard in front of the whole class.
True to her expectations, the mare had achieved orgasm, but not even the clenching of her pucker as she rode it out seemed to slow the young bunny banging her for all she was worth. The boy was a prodigy and Sylvia knew that by now she was quite a mess. Her eyes were lidded as the savage sodomy kept her riding the aftermath of her climax, her pretty muzzle gaping and her tongue hanging past her lips. By now all of Bill’s load was a milky puddle between her knees, pumped out by the humping of a bunny who was sure to replace it with his own.
But even a prodigy like Timothy couldn’t keep going forever. Without warning, the boy launched not only his hips but his whole body at her with such force that Sylvia wound up falling forward, her luscious chest serving to cushion her fall as she ended up with her face flat against the gym mat. She heard the squeaks from above and clenched down as hard as she could after the numbing ride her ass had been subjected to. Without the constant rutting, her second climax wasn’t as drawn-out as the previous one, but it proved thoroughly satisfying as she felt the soothing warmth spread through her violated behind with every twitch of the lapine length caught under her tail.
“Well I think that… will be all for today…” the mare said, managing to rise to a kneeling position after the bunny had finished and pulled his softening cock from between her sore cheeks. “I’ll send you all a recording of today’s lessons and for homework I want you all to review the footage so you’re ready for tomorrow.” She said, casting a glance at Tessa’s little group where the young nanny seemed to be finishing up as well. She’d moved on to pegging, and it looked like the little mink wrapped around her had taken just about all she could for today. As her students began dressing, she figured she’d stick around until Tessa was done. Sylvia wasn’t all that into girls but the young goat was, and was always willing to stay behind and help teacher clean up…
*******
“Okay Emily, now just breathe steadily and relax. Once Daniel’s knot finishes growing, he can start moving around a little…” she said, patting the hand of a Tabby who was wincing a little as she got tied for the first time.
The sound of clacking hooves joined the squeaks, slurps, chirps and moans as the whole class busily copulated. After three days of diligent study, the boys and girls were now putting knowledge to practice on each other, while Sylvia and Tessa went around helping and making sure they were doing it properly. The snow-furred goat was helping a mink and a young Dobie girl get into position, maneuvering their hips until the girls’ mounds were pressed against each other. She seemed to have things well in hand, and the two girls were soon gasping as Tessa showed them how to grind and push their cunnies against each other.
“Norman, remember what I said about lube?” Sylvia asked, addressing a young grey mouse.
“Never use too much?” the boy asked, the applicator half-way to the round behind of Beth, a shy young bear-girl who was looking eager for her first taste of anal sex. The mare just noded and true to his word the mouse was careful to squeeze out only a modest squirt of the cool goo under the plump girls’ stubby tail.
“Miss Sylvia, could you help us out?” came a piping voice, and the mare made her way to Emma – a young raccoon girl on her back, legs spread wide and still having trouble getting Ike’s flared tip into her.
“Don’t worry Emma, flared ones can be tricky, Just use both hands to spread yourself as wide as you can… There’ that’s good…” she said, grasping the donkey’s cock just behind the blunt tip. “Good, now if Ike will give us a little push. And there we go!” she cooed as the blunt tip of the young jack sank between the coon-girls lewdly splayed lips. “Now just keep in mind you won’t be able to take all of him, so don’t strain yourself trying, okay?”
“OhhHhh-kay…” the girl gasped, and the mare left the pair to their fun.
All around her young bodies were writhing and bouncing, the air filled with the scent of sex and the sounds of boys and girls learning how to be young men and women. The mare was as buck naked as they were as she moved along them, her stiff nipples and moist slit proof that she was enjoying the sights and sounds as she helped and corrected the young lovers where necessary. Her won needs would have to wait, but exhausting as the day would be she was sure a boy or tow would be willing to stay a bit after class…