Morgan was a young Doberman in his first year of college when he laid his eyes on a fellow freshman member of the swim team with a particularly large bulge in his Speedo. It was only the first day of practice, but Morgan couldn't ignore the way that the palomino's junk stretched out the fabric of his skimpy blue swimwear. The palomino's name was Charlie, and his stature was every bit as big as his bulge. If the two freshman stood next to each other, the top of Morgan's head would only come up to the bottom of the golden palomino's muscular chest.

The black Doberman's body was well toned, if a bit thin, with a four pack abdomen proudly on display above the respectable bulge in his blue Speedo, but Charlie put Morgan to shame, possessing a much thicker frame overall, and a six pack abdomen to compliment the enormous bulge in his swimwear. When practice ended, the whole swim team went to the showers, removing their Speedos, and letting it all hang out. Of course the Doberman couldn't resist getting more than a few glimpses of Charlie's immense equine dong, and hand filling balls.

Even after Morgan had finished showering, he found himself a bench in the locker room where he could watch the palomino from afar, stroking his dark pink canine shaft that had popped free from its sheath. At full length, the Doberman's cock became seven inches long, sticking out above his ballsac that reached three inches across, with each nut equaling the size of a ping pong ball. While Morgan's dick could be described as thin, the bulbous knot near the base of it swelled out to the size of a lemon as he stroked himself to a full erection.

After a few minutes, Charlie was the only one still in the shower room, and to the Doberman's surprise, the palomino looked straight at him and motioned for him to come. Morgan felt penis grow even harder as he stood up almost immediately, unable to resist the opportunity to get a look at such a massive cock up close. The Doberman could barely keep his hands off of his canine shaft as he approached the tall, muscular palomino who was grinning ear to ear at him. "Hey bud, like what you see?"

Morgan huffed as he came to stand before Charlie and his enormous brown schlong. "Hell yeah I do, you've got the biggest dick I've ever seen! I bet all the guys in high school used to beg to suck your cock." The palomino laughed. "You'd be surprised, most of them were too scared of me to even ask. I guess being tall and well built has its own drawbacks, but still, that didn't keep you away huh? You've got balls coming up to me after I saw you jerking off to me taking a shower, I respect that. A lot of guys would just run off, and they usually do."

The Doberman laughed. "I guess I just can't keep my mind off of you. I was thinking about you the whole time during practice, you and that big fat shaft of yours. It's got to be longer than mine, but it's totally soft, and your balls are like double the size of mine. I'd love to know how much cum those things can put out." Charlie huffed and smirked. "Want to find out, pup?" Morgan swallowed hard as the palomino began to stroke his thick horse meat. "Would I ever?! You mean you'll let me suck you off? Really?" Charlie's grin widened as his penis engorged, growing longer and thicker with every stroke of his hand. "Yeah, really. Go ahead, get on your knees, and get a closer look at what I'm packing."

The Doberman practically fell to his knees before the palomino's swelling shaft, and heavy brown balls, watching hungrily as Charlie stroked his huge dick until it became erect. Charlie's cock was gigantic, reaching fourteen inches in length, twice as long as Morgan's, while being much thicker, with only the Doberman's swollen knot coming close to equaling the palomino's staggering girth. Charlie's ballsac was easily two times the size of Morgan's, reaching six inches across, hanging low beneath the palomino's fat shaft. Charlie placed his hands upon his hips. "Alright puppy, start sucking, but don't hurt yourself. It's as big as it looks."

The Doberman breathed in deeply. "Of fuck yeah." Without another word, Morgan wrapped his jaws around the bulbous, flared head of the palomino's incredibly girthy erection. For a moment, the Doberman teased the sizable opening of Charlie's urethra with his tongue, finding it surprisingly easy to squeeze it inside by more than an inch almost immediately, making him sure that the palomino must have enjoyed frequent sounding with some rather large insertions. Sinking his tongue deeper into Charlie's urethra, the Doberman took several inches of the palomino's shaft into his maw, biting down and sucking upon it.

Charlie groaned and placed a large hand upon Morgan's head. "Yeah, that's the stuff, pup. Get your tongue down in there as far as you can go, and keep on sucking. You'll get your treat before you know it." The Doberman responded obediently by forcing more of the palomino's fat shaft into his mouth until its head was pressed up against the base of his tongue that now reached six inches into Charlie's urethra. Charlie moaned deeply from the feeling of having his urethra stretched while his penis was sucked upon, causing a large spurt of precum to force its way around Morgan's tongue and down his throat. "Don't tell anyone, but I'm kind of a quick shooter, pup. I don't know how long I can last with your tongue jammed in my cock like that. Just keep doing what you're doing and it won't be long."

The palomino gritted his teeth as the Doberman began to suck upon his dick with more vigor, making Charlie have to fight to suppress his orgasm, but with Morgan's tongue pressing out from the inside, and his mouth squeezing down tightly around him, the palomino couldn't hold out any longer. "Oh fuck, here it comes boy!" Panting and grunting, Charlie came, forcing spurt after spurt of his thick equine seed out around the Doberman's tongue, and directly into his throat. Each spurt of cum made the underside of the palomino's erection bulge outward as Morgan greedily swallowed each and every drop that Charlie was putting out.

The Doberman's four pack abdomen gradually vanished as it rounded out into a small pot belly that grew bigger as the palomino's orgasm went on and on. By the time Charlie had finished cumming, and pulled his erection free from Morgan's maw, the Doberman's belly had grown to the size of a basketball. Morgan panted heavily as he clutched his bloated stomach. "Holy shit... man that's a lot of cum... I knew your balls were big, but wow!" The palomino laughed and helped the Doberman get back onto his feet. "Thanks kid, I'm glad you're impressed, and you know what? I'm impressed too, most guys your size can't pleasure me half as good as you just did. You've got a real talent for sucking dick, pup."

Morgan laughed. "Thanks man, you could say I've had a lot of experience in that regard." Charlie grinned. "Yeah, I can definitely tell. But hey, I've got a question for you, since you're such a big fan of my package. If I told you that you could help me make it even bigger than it is, would you be up for that?" The Doberman looked shocked. "What?! You can make it bigger?! How?!" The palomino's grin widened. "Well you see pup, I wasn't always this big. Us horses are naturally larger than average, sure, but I have a special talent for taking another guys size and making it my own, you dig?" Morgan looked confused. "Take their size? Like their dick and balls?" Charlie nodded. "Yeah, that's right. They get smaller, I get bigger, it's as simple as that, but it only works if the other guy wants it to happen, so I've only gotten to do it twice."

"Even then, they were only willing to give up like an inch or two, I mean that's totally fine of course, I'm not asking for much if you want to do it." The Doberman looked down at his seven inch erection that was still hard and throbbing, before glancing over to the palomino's fourteen inch monster cock. "Could you... take it all? Like, all of my size?" Charlie's penis throbbed powerfully in response to Morgan's words. "All of it? Really? I mean, are you sure dude? I can totally do that if you want, but you have to really want it." The Doberman smirked. "I'm sure. I'm a dedicated bottom, so having all this just gets in the way, really. That and I'd give anything to see you get as big as possible."

The palomino shrugged. "Alright, well if that's your decision, then it's cool. If you're okay with it, I'd like to try something a bit different from the other times I've done this. Are you familiar with sounding?" Morgan nodded. "Yeah, I've heard of it, though I've never done it. It's where you stick stuff into your dick, right?" Charlie laughed. "That's right, and it feels so damn good too. How about I use your cock as a sound for my shaft while I take your size? Would you be okay with that? I think you're thin enough that you should fit inside." The Doberman looked unfazed. "Sure, go ahead if that's what you're into, I don't mind." The palomino grinned widely. "Alright then, let's get started."

Grasping Morgan's pointed canine erection with one hand, Charlie aimed the head of his own far larger equine penis down until their tips were touching. Moving his hips forward, the palomino pressed the tip of the Doberman's dick into the opening of his urethra, slowly engulfing the first inch of Morgan's cock with his own. The bulbous flared head of the palomino's cock jutted out over the Doberman's shaft as the underside of Charlie's penis bulged while it was gradually fed more and more of Morgan's meat. The Doberman watched in awe as his erection was swallowed by the palomino's dick, until Charlie's round head pressed against Morgan's thick knot that was nearly equal to it in girth.

The palomino's stretched dick throbbed tightly around the Doberman's shaft as Charlie pressed the opening of his urethra against Morgan's knot with a bit more weight, but the knot was so large that the palomino's opening couldn't even begin to stretch around it. "Your cock might be kind of skinny, but you've got a nice big knot down there. I can't wait to squeeze it inside my dick." The Doberman could only watch on as Charlie began to rock his hips, sliding his huge erection back and forth over the length of his canine penis. "Me too man, this is hot as fuck." The palomino slid his girthy erection around Morgan's shaft all the way to the tip before thrusting it back down where it pressed against the Doberman's knot once more, going slowly back and forth, over and over.

Morgan felt his dick tingle each time Charlie's cock head bumped against his knot, adding to the already immense pleasure he was receiving from fucking the palomino's shaft. "Do you feel it pup? Each time I hilt you, I take a little more of your size. You dick, your balls... your knot." The Doberman watched closely as Charlie thrust himself back and forth over his penis, and surely enough, it seemed a bit smaller than before, not by much, but still enough of a difference for him to see. "Whoa... that's crazy, it's really shrinking, isn't it? It feels super weird, but really good too." The palomino smiled down at Morgan. "That's good to hear, because I'm going to enjoy taking everything you have." Charlie picked up the pace a bit, thrusting himself back and forth over the Doberman's shaft a little faster than before, bumping into Morgan's knot again and again.

Over time, the bulbous head of the palomino's erection began to further outsize the Doberman's knot, looming over it more every time they touched, while the opening to Charlie's urethra began stretching out over the top of Morgan's knot. As the Doberman's knot shrunk, so did the rest of his cock that became visibly shorter and even thinner than it already was. Morgan's balls were not spared from the hunger of the palomino's package, as they too were shrinking down in size. For all that the Doberman was losing, Charlie was gaining, as his ballsac gradually swelled larger, and his already immense dick only grew longer and thicker around Morgan's shriveling shaft.

More time passed as the palomino stretched himself over the Doberman's penis, pressing his swelling cock head against Morgan's diminishing knot time and time again, as the opening to his urethra stretched out over a sizable section of the top of the Doberman's knot, swallowing a little more of it with each thrust. Every time Charlie pulled his erection back, Morgan's dick was a little shorter, and a little thinner than before, while a quick grab of his balls confirmed that they were getting even smaller. All the while, the palomino's ballsac expanded slowly, and his girthy shaft grew fatter and longer still.

Once more time had passed, the Doberman's cock and balls became only half of their previous size, with Charlie's swelling penis barely having to stretch to fit around Morgan's thinning length. The head of the palomino's huge dick now greatly outsized the Doberman's knot, and the opening to his urethra stretched almost halfway across its girth, with every thrust, and every touch of Charlie's growing head bringing it closer and closer to swallowing Morgan's shrinking knot entirely. The palomino reached down to fondle his swelling balls as he enjoyed the show below him. "You know what? I think I'm going to put the rest of your dick size into my cock head, and make it big, like really fucking big."

The Doberman was breathing heavily, and too caught up in his own pleasure to really listen. "Y-Yeah, sure, go for it dude, whatever you want." Charlie pulled his huge erection back almost to the tip of Morgan's penis before thrusting himself all the way down to his knot, where the opening of his urethra finally stretched all the way around it with a satisfying pop, allowing the swollen head of his cock to press up against the Doberman's groin. While it was a tight fit, it almost instantly became a little looser as the bulbous flared head of Charlie's shaft visibly grew a bit larger before Morgan's eyes, while his knot shriveled within it's grip. As the palomino pulled his head free from the Doberman's knot, it was obvious that the knot had shrunk a bit just from that one thrust alone, making Charlie grin. "Time for the finale, kid."

Pressing his girthy cock head against Morgan's knot, he engulfed it once more, causing the head to grow again, while the Doberman's knot trapped inside shrunk. Again and again, the palomino's bulging dick head swallowed Morgan's diminishing knot, having to stretch around it less and less every time. As the assault on the Doberman's shaft continued, his ballsac also shriveled up more as it was consumed by Charlie's growing balls, that looked heavier with each passing moment. After a few more thrusts, the palomino hilted Morgan's greatly shrunken dick one last time, his cock head hardly having to stretch to take the knot inside of it as it grew once more. The Doberman could no longer see his erection, but he knew it was getting smaller with each throb of Charlie's bulbous dick head as it enlarged every couple of seconds, while it's grip around his shrinking knot became looser.

"This is it, pup. Are you ready to say goodbye to your shaft?" Morgan panted as he looked down at the flared head of the palomino's erection, watching it swell larger a few times against his groin, while feeling his knot and now puny penis shrink several times as well. "I... y-yeah... I'm ready... t-take it all!" Charlie smiled and petted the Doberman's head. "Good boy." Morgan watched on as the palomino's round cock head grew again and again around his tiny shaft, becoming obscenely large while the Doberman's balls were almost entirely drained into Charlie's swelling ballsac. Each time the palomino's dick head throbbed, it grew larger, and Morgan's pathetic penis shriveled within it, time and time again until finally the pleasure stopped, and Charlie's now eighteen inch phallus dropped down below the Doberman's crotch, as there was no longer an dick there to support its weight.

Morgan breathed deeply as he came down from his pleasure high, staring in awe at the palomino's even bigger shaft, his greatly enlarged cock head, and the now eight inch wide balls that hung heavily beneath it. "H-Holy fuck... you're huge..." Charlie laughed and patted the Doberman's now featureless groin. "Yeah, and it's all thanks to you, null boy. Hey, I have to get going, so how about we meet up tomorrow and see how much I can cum again?" With that the palomino laughed and walked out of the shower room, leaving Morgan all by himself, rubbing a hand over his bare crotch. "Uh, y-yeah, sounds awesome dude... catch you later!" The Doberman stood in silence for a moment. "Ah man, how am I supposed to jerk off now? ...Shit."