It was the last class Friday afternoon and Quinn was failing to stay attentive. The professor droned on and on about the importance of cooperation between early European settlers and Native Americans while the white-furred wolf slipped in and out of consciousness. Quinn wasn't learning anything he wasn't already taught through grade school, but then again, it was only the first week of classes. He simply could not keep his mind off the new arcade stick he'd purchased a few weeks ago before school started. The white wolf spaced out and fantasized about becoming the best player in the FGC, even though he was terrible at every fighting game he played. Quinn's favorite game was Road Brawler IV, though the best he could do in it was just to mash out uppercuts and reversals online. Regardless, for him it was a much more desirable waste of time than sitting in a class relearning things he already knew. 

The only thing that would steal his focus away from fighting games was the big, beefy, brown equine sitting a few rows in front of him. The horse towered at eight feet in height, almost two and a half taller than Quinn, and had a beautifully muscular physique. He wasn't body-builder huge, but was far from looking like the kind of guy who lifted only a few times a week. Quinn was able to get a good look at the horse's upper body considering he never wore a shirt. Strangely enough, no one seemed to notice or care either. And then, the equine's legs were about as muscularly balanced as his arms were. He certainly didn't skip leg day at the gym. As for the area in between the legs, well, Quinn tried not to stare. The wolf's fascination with the horse wasn't entirely sexual though. He came from far up north, and never really saw many horses. Apparently, their average height was seven feet tall, with the largest recorded horse in modern times being fifteen feet in height (the average height of a horse back in the Jurassic era was fifty feet, as shown by many excavated skeletons). Of course, he also heard rumors about them being well endowed, but he never imagined that their privates would be so large. Well, maybe on the fifteen-footer, but not the one standing in front of him. He found it amazing that the horse could so much as walk normally, and he didn't even want to imagine the horrors of trying to suppress a boner in public. He had enough issues hiding himself.

Eventually, the clock saved Quinn from uncomfortable thoughts about cock. The wolf was relieved to finally be dismissed, and scurried right out the door. However, during his trip back to his dorm, he made a curious observation. The overly masculine equine followed him every step of the way. Quinn began to get nervous as the walk went on, making the five minute stroll into an eternity-long journey. The white-furred, red-eyed wolf was worried that the horse may have noticed him noticing him, so he tried to just push the his existence from his mind . Quinn nearly jumped when he heard the clop of hooves walk in behind him in the elevator, revealing the eight foot behemoth.

“W-what floor?” Quinn asked, trying to calm his nerves.
“Fifth,” the horse said. Quinn's room was located on the same floor. “Boring class today, huh?”
“Yeah,” the wolf said in a hushed tone. He didn't know whether to feel delighted or terrified that the brown giant recognized his existence.
“Wanna' come to my room for a drink? You look kinda thirsty,” the horse proposed. Only then did Quinn realize that he'd been subconsciously licking his lips for most of the elevator ride.
“Uh sure, but I- uh, what's your name?” the wolf stammered.
“Darius,” the horse replied.
“Ah, cool, I'm-”
“Quinn, I know,” the horse interrupted.
“How did you-”
“Dude, you're like a door down from me,” Darius said. 

Sure enough, when the elevators opened, the two walked right by Quinn's room and into Darius's. As soon as the giant equine ducked inside, he locked the door behind him and began to unzip his bluejeans, revealing a thick black dick as wide as both of his arms put together and about three feet long, along with plump chestnut-brown balls which dropped all the way down to his knees, filling the gap between his legs. Darius started talking before Quinn could even process what was going on.
“You said you were thirsty, and I've got a nice glass of milk waiting for you. Go ahead and drink up,” Darius said. Slowly, his member began to extend and harden, and Quinn's reaction was similar to that of a deer and oncoming headlights, and it didn't help that the equine's parts looked much larger outside his pants. Darius then pulled down Quinn's pants, despite his protesting. The horse was actually a tad surprised by what he found. The wolf had a bright red erect dick that stretched out about two feet long and was a few inches thick. A little further down, Darius could see that his balls were twice as large as the average wolf's. They were a good size, but just small enough not to bulge too noticeably in his pants. Quinn was surprised to see himself erect. 

“Well now, looks like somebody smuggled in their own beverage,” Darius said.
“I uh-” Quinn began.
“You wanna stuff me good, or would you rather enjoy mine instead?” the horse interrupted.
“Come again?”
“I said, do you want to fuck me up the ass, or would you rather take me up on my previous offer?”
“The seco- no, wait, what? I should really get going.”
“You know you want it,” Darius said. 

Quinn paused for a moment, then placed an open palm on the horse's monstrous dick. A shiver went down the wolf's spine, and he began to rub a little bit. The horse's skin was so smooth that he just wanted to keep sliding his paws up and down it, enjoying the texture. By the time Darius's penis was fully erect at six feet in length with a two foot diameter, Quinn had begun to rub his entire body against it. Darius sat down, enjoying the sensation of each stroke against his massive, throbbing member. The wolf's soft, silky fur brushing against his skin would even force out a feral-sounding snort every now and again, and the canine's slobbery tongue rolling around his length definitely helped whet is sexual appetite. Within a minute, pre started to dribble all over Quinn, and after a little longer, Darius climaxed. He let out a loud, deep moan while Quinn howled.

What must have been five or six gallons of cum shot up on the ceiling and splashed back down all over Quinn and Darius. The wolf cleaned the tip of his nose and the flare of the horse's penis with his tongue.

“So how's my milk taste?” Darius asked.
“A little salty,” Quinn replied, “Now how the hell am I going to get cleaned off?”
“Well, your fur's already white. Just rush into the showers and you're golden. They're just across the hall, so you can dash in without being seen,” Darius replied.
“But I can't just leave you here with this mess to clean up.”
“Don't worry about it. Just take one of my towels and the shampoo.”
“Okay, thanks, see you in a bit I guess,” Quinn said. 

The wolf then peered through the door's eye-hole to make sure no one was around, then he dashed into the showers. After a few minutes in, he'd only managed to clean his head, and was scrubbing his arms vigorously. However, when he went to reach for more soap, something massive placed itself in between him and the water. 

“Done already?” The wolf chuckled at Darius.
“Yes, and I noticed that you're wasting so much water,” the horse said. Quinn had a puzzled look on his face. “Now c'mere.” Darius then grabbed Quinn's shoulder. The wolf was wide-eyed and shuddered as he watched the equine behemoth expand and grow. The horse kept stretching up and up until he stopped at what looked like 600 feet. Quinn nearly came then and there.
“What in the...” Quinn said, marveling at the giant before him.
“I'm sorry, I can't hear you all the way down there!” Darius boomed. His voice nearly toppled the wolf over. The horse then knelt down and placed his house-sized ear right over Quinn.
“You just grew a few hundred feet in a few seconds. Holy shit, you're huge!” the wolf shouted. Quinn's voice barely registered as a whisper to the equine leviathan.
“What are you talking about?” Darius boomed once more, “You're the one who's changed.” Quinn furrowed his at the words and began to look around. He then realized what the horse meant. The once tiny floor tiles stretched out like sidewalks, the shower nozzles were placed as high up as skyscrapers, and the door seemed miles away. Quinn realized he could be no more than a single inch tall.
“What did you do to me?” Quinn shouted.
“I made you small enough to take a more... eco-friendly shower,” the horse said. He then stood back up and hung his massive black dick over the tiny wolf. “Hold your breath,” Darius said as he began to rub his hardening member. Within a few seconds, he came, sending a torrent of pearly white cum onto the miniscule canine bellow him. Quinn was swept a few feet by the white stream and was, needless to say, drenched. When the wolf finally managed to regain his footing, Darius was looming over him once more. “Alright, I've had my fun,” the gigantic horse said. Darius then crouched down and slowly began to lower his thumb onto Quinn. The wolf tensed up and and closed his eyes, expecting the equine behemoth to crush him then and there. Instead, he only felt a little pressure, and when he opened his eyes, he was staring face-to-face with the horse. Quinn was about to mouth off to Darius, but the horse spoke first.

“You look even better when you're tall,” Darius said. Quinn then realized that he was staring eye-to-eye with him. By now, the wolf had just about gotten over what happened. 
“You do too,” Quinn said, “I'm even more impressed with how fast you recharge.”
“I didn't recover at all. My balls just produce so much cum that I have to get off twice to release it all,” Darius explained. Quinn felt his dick throb a little. “Now, to see what we can do about your side of the bargain.” The horse crouched down and began to fondle the wolf's still erect penis. “It's a good size normally, but if I'm going to feel it, it's gonna' need to be a bit bigger.” Quinn smiled, he liked where this was going.

Darius then squeezed Quinn's dick a tad. The wolf let out a small chuckle as he watched the magic happen. In front of him, his privates began to rapidly expand, and the wolf had to try his hardest to keep from jizzing during the process. By the time his dick and balls stopped growing, they were massive. The wolf's red rocket reached up to the top of his head and was thicker than his torso. His balls plopped down to the floor even when standing, and they filled up any space in between his legs. Walking became horribly awkward, but somehow, he managed to make it over and on top of Darius.

“Give it to me big boy,” Darius said. Quinn did just that. The wolf shoved his oversized dick into the horse's ass. Quinn's penis bulged a few feet outwards in Darius's stomach, and he came instantly. A rocket of cum burst from the horse's ass around the knotting penis, and the couple moaned so loudly it could be heard a floor above and bellow them. Quinn nearly passed out from a dopamine overload, and his dick and balls slowly shrunk down to normal size.

“That was... different,” Quinn said with a smile on his face.
“Yeah, that was nice. Been a while since I had a good dicking,” Darius replied, “Actually, I can't remember the last time I took it up the ass. Hell, you may've been the first.”
“D'awww that makes me feel special,” the wolf replied, “Want to actually get cleaned up now?” Darius nodded. The two then took a shower together under the same nozzle, cleaning each others' privates slowly while making out. A few people came in to use the restroom, but none looked terribly surprised. One guy snickered, but a quick sneer from Darius shut him up. Afterward, they went to their separate rooms to get dressed, and went their separate ways, but not without a good bit of good-bye fondling and kissing. Darius had one more class to go to and promised to meet up with Quinn after for dinner.

To pass the time, Quinn just surfed the internet and played back the events of the day through his mind over and over, getting worked up for what might be done after their date. He started to rub himself a bit when he thought about Darius unzipping his jeans and when he made his dick huge. The wolf wasn't too terribly fond of the shrinking, but it still kind of turned him on. But oh man, he loved watching his dick get bigger and bigger. Quinn began to get hard once more, but when he went in for the first stroke, he felt a small shock jump from his hand to his penis, like if he were to roll around on the carpet for a few minutes and feel a static shock. Ten seconds later, his dick and balls began to expand just like in the shower room, except this time, they grew much, much bigger. By the time they settled down, his privates were twice as large as they were in the showers. This change was unprecedented, and freaked him out a little. After a few minutes of being immobile from such large meat, an idea sprung in Quinn's mind. Slowly, he reached his paw out to his dick, and thought really hard about it returning to normal. Much to the wolf's relief, it did. And instead of being worried, The white wolf was now curious.

Quinn then wanted to see if he had somehow gained the horse's abilities, so he placed both paws on his chest and focused on shrinking down to about an inch tall. Once again, an electric pulse shot through his hands and into his body. When he opened his eyes, the world again towered above him. The wolf was ecstatic at this. Quickly, he sent himself back up to his normal height, and started playing around with his abilities. Quinn would make his foot-paw bigger than his chest, or his balls bigger than his entire body, and he even shrunk himself down a few times to enjoy his disproportionate size-play better. However, the only change to his body he kept was what he did to his tail. Quinn loved long tails, so he grabbed his own and let it hang all the way down to the floor, instead of just a foot or two behind him. The wolf experimented with bulked up muscles, but decided he looked better without being ripped. Having had fun with his new found abilities, the wolf began to prepare for his dinner date with Darius.

* * *

The big, meaty horse had just left his anthropology class and needed to hurry back to the dorms if he wanted to enjoy dinner with Quinn on time. So, he ducked into the alleyway that cut through a few buildings and let out right in front of his dorms. About half a block in, a very suspicious and buff panther walked out from the shadows and pointed a knife at the big horse. The cat stood eight feet in height, two above the average for his species, and had jet black fur with golden eyes. The cat wore baggy pants and no shirt. Darius stifled a chuckle. He was hoping this kind of thing would happen. It'd allow him to indulge one of his less desirable fetishes without feeling guilty.

“Gimme all you got, I want your money, not your life but if ya try to make a move I won't think twice,” the panther threatened. Darius smiled.
“You can have my cash, but first you know I gotta' ask...” The horse trailed off, then quickly spun around and grabbed the panther's knife-wielding wrist, “What makes you wanna' live this kind of life?” As soon as those words left his mouth, the panther began to shrink, quickly becoming too small for his pants. Darius held on to him the entire time by the wrist, switching to two fingers when the panther shrunk small enough. When he finished making the poor panther smaller, the cat stood at only a single centimeter tall, dangling in between the equine leviathan's index finger and thumb. The mugger was too panicked to speak at the sight of what looked like an 1,800 foot tall giant, so Darius said the first words as he pulled down his own jeans.

“Oh now look, yo got me all pent up down there. You have to help me fix that now,” Darius boomed as he sat down in the alley, pants down and dick fully erect. He then put the panther down in the palm of his hand and slowly grabbed his massive black penis. Then he rubbed up and down while slowly gripping harder and harder until he felt the tiny cat's body give way, smearing a tiny spurt of feline on his palm and cock. “That was nice, but you would've been a better porn star.” The horse got up to leave, but another three men, all as big as the panther, walked into the alley. One was a green-scaled lizard, one was a buck and the other was a tiger.

“Hey, what the fuck you doing on our turf all naked and shit?” the buck yelled.
“Don't act like you guys don't want it,” Darius said in a playful tone. This aggravated the mob, and they all dashed at the beefy horse. However, one single tap per person was all Darius needed, and within seconds, the three men were now centimeter tall micros. When they noticed how big the horse was before them, they tried to run. Their efforts were futile. First, Darius slammed his hoof down on the buck, quickly crushing him to a red pulp. Then, the equine behemoth reached down and grabbed the two remaining men in his hands. Immediately, he crushed the tiger in his palm, making sure the lizard was watching. He then raised the lizard right in front of his face.

“Now, that's not the way you want to go, is it?” Darius said to the cowering Lizard. His captive was only able to shake his tiny head. “That's what I thought. So, I won't crush you like the insect you are.” The lizard looked relieved, but still fidgety. “No, I won.'t. You see, fur is gross and get's stuck in your teeth, but scales and hide however...” Darius trailed off, and the lizard started flailing again while making barely audible screams which sounded more like squeaks to the horse. Slowly, Darius raised his hand above his mouth and dangled the lizard over an open maw. The stench of the horse's breath enveloped the lizard, whose struggling only became more and more desperate. Before dropping the tiny lizard in, Darius sent out his long tongue and gave his captive a nice long lick. “Delicious.” The horse then dropped the lizard into his mouth and bit down on him with a loud crunch, then swallowed, licking his lips.

After a minute or so, Darius fished out a few tissues from his jeans and wiped himself clean. Then, he flexed his arms for a few second so his erection would die down. Finally, he put on his pants and headed back to his dorm like nothing ever happened. Quinn was waiting outside his door for him.

“Sorry I'm late,” Darius said as he unlocked the door. The wolf followed him inside.
“Notice anything different?” Quinn said. The horse then realized that Quinn was back to his normal height, and had a much, much longer tail. He just wrote the physical developments off as a side effect from earlier.
“I like the tail, but you're way more sexy tall,” Darius said.
“Oh? How tall?” Quinn asked in a playful tone. The wolf then rubbed his chest and shot up to ten feet in height, having to arch his neck down because of the shorter ceiling. “This tall?” The horse, though quite surprised, let out a laugh.
“Nah, I like my men right with me,” Darius replied. Quinn shrank himself down to eight feet.
“Why don't you go all out with yourself?”
“Whadya' mean?”
“Like, what's stopping you, or I guess me too now, from making your dick bigger than the planet, or growing large enough to fuck the downtown skyscrapers? Or even forcing people to worship you for being so huge?” Quinn asked. The horse thought for a second then spoke.
“Well, for one, I want to take you out to dinner,” Darius said.
“Darry, I don't think I can last till after dinner. Tell me your real reason.”
“I guess I never wanted to be alone, despite how cool being huge may be.”
“Well, what now then? With me you wouldn't be alone.” Darius saw where this was going, and he kinda liked it. “Let's make this world ours.” Quinn said, with a slightly menacing undertone.
“But how should we start?” Darius asked, trying to sound as seductive as possible.
“I dunno...” Quinn trailed off as he ran his tongue up the horse's penis.
“How about fucking to fifty?” Darius suggested.
“I call bottom,” Quinn said. 

Then, fully erect, Darius rammed himself inside the wolf as best he could, and they felt the sparks fly. With every hump, they grew a few feet, and by the time they were done, they sat on top of the wreckage from their dorm with cum flooding the streets. Quinn looked around, enjoying the new view while Darius pulled out. Afterward, they sat for a few minutes, enjoying reactions made by shocked onlookers. Quinn and Darius sat over fifty feet tall, and stood even taller.
You know,” Quinn begins while standing up, “It really bothers me how they just look and run away. Those tiny guys should be kneeling before us at our feet.” The wolf raised his foot over a fleeing crowd. “Even ants are more obedient.” Quinn then slammed his paw down, crushing those bellow it in a red mist. The wolf grew a little in the excitement. “Mmm, that was satisfying.” Darius was surprised at Quinn, but joined in on the fun and started to stomp out every speck he saw. After painting the streets, Darius' stomach roared.
“Maybe we should've gone out to dinner after all,” Quinn remarked, “Come to think of it, I'm a little peckish as well. What would you recommend, Darry?”
“I hear insects are a fancy meal in some parts,” the horse replied. Quinn smiled and stood on all fours over a fleeing group. The wolf lowered his muzzle, then scooped up a few people with his tongue, rolling them around in his mouth until he decided to swallow. By the time he finished, Quinn and Darius both were over 200 feet tall.
“But all that's made me quite thirsty, you wouldn't happen to have a drink, would you?” Quinn asked Darius. The horse grinned, grabbed the back of Quinn's head, and pushed the wolf's muzzle on his giant penis. He squirmed and shivered as Quinn sucked. Within a minute, the horse came, and Quinn chugged about half of it before gasping for breath. When the wolf looked around, he saw thousands of gallons of white liquid flooding the general area and noticed that he and Darius were crushing quite a few buildings under their bodies. The couple were now 500 feet tall and ready for more.

The giants eyed the nearby city with its large populace and even taller buildings. With each step they took on the way, they grew a little. Every stomped out house or group of onlookers would increase their size foot by foot, and by the time they reached the city limits, the wolf and horse had grown another hundred feet. Inside, most of the buildings were shorter than the two behemoths, but Quinn and Darius still managed to have a little fun before they hit the skyscrapers. The white wolf would swing his massive balls back and forth into smaller buildings in a dance of destruction, occasionally tripping over and crushing the structure below. The horse would tear holes in the streets with his hands, then shove his dick into the subway system, letting the train cars penetrate themselves on the massive equine's meat. The subsequent orgasm that followed would flood the entire subway and even cause manhole covers to blow their tops. The pleasure derived from their actions caused Quinn and Darius to grow more and more. As they walked toward the city's skyscrapers, the two crushed everything in their path, increasing in size with each step. Sidewalks, people, cars, and buildings crumpled beneath the leviathans' feet, leaving a clear path of destruction behind them amidst a flood of white fluid.

By the time they reached the skyscrapers, both Quinn and Darius were around 1200 feet tall. Only three buildings matched their height, one of which was crushed to pieces when Quinn tripped and fell on top of it. After helping him up, Darius made his way to one of the two remaining buildings, and Quinn followed suit. The horse and wolf then readied themselves behind their designated skyscraper and waited for their erections to rise once again. At this point, Quinn's penis was about half as long as he was tall and two-thirds as thick as his torso while his round white balls fell to just above his knees. Darius' throbbing black member, however, stuck out equally as far as he was tall and was as thick as his entire torso while his chestnut brown scrotum hung down around the tops of his shins. Readied for action and facing one another, the two decided to make a game out of their impending actions. Whoever finished first won. 

The gigantic Quinn and Darius then penetrated their skyscrapers and began to hump. Each thrust caused the buildings to shake and break. It was a miracle that neither of them immediately crushed the structures on impact, but it certainly didn't take long. After about a single minute of pounding on the poor buildings, Darius' releasing thrust delivered the final blow to both the skyscraper and the competition between he and Quinn. Cum flied everywhere, especially all over Quinn who subsequently jizzed himself, toppling the building. The instant euphoria caused a massive growth spurt that shot both of them to 36,000 feet in height. The macro's feet alone dwarfed the entire city at this point, and after taking in his new size, Quinn made sure to leave a nice paw print impression where the city once was. Now, the couple wasn't sure what to do next. Quinn and Darius just began to see how much of the landscape they could fill with their cum. Eventually, they became so large that their hoofs and paws flattened countries and continents with single steps while their seed replaced water in the oceans. The two just came and came until they were big enough to just float in space next to the planet. Once large enough for the planet, Quinn and Darius instantaneously knew what the were going to do next. First, Darius positioned himself so that his rump faced toward the Earth, and Quinn began to drill a starting hole int the planet. Then, the white wolf made his dick grow to around two body-lengths in front of himself and rammed it into the planet. His dick penetrated through the Earth and then into the horse's brown ass. Upon entry into Darius, Quinn thrust and came with a force which split the planet open, spreading pearly white cum into Darius and space. After that, the two repeated the action with larger and larger planets as they grew in size, eventually becoming too large, causing them to switch to stars. Then it was solar systems, galaxies, and whatever else they could find which was larger than them. They didn't stop until all they could see was their own seeds.