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The Rubber Stallion for Sunkit by Draconicon

The process of transformation was never an easy one, though that was only what Trevor had heard before that point. Experiencing it was something else, and he had a hard time just holding himself up as he collapsed to the ground, the fluids from the experimental tank oozing out around him. He panted for breath, shaking his head as his arms and legs trembled with the effort of just holding him up.

It was...it was terrifying, he supposed, to be transformed. It hadn't hurt - at least, he didn't remember it hurting - but seeing his skin go from pale to black latex was beyond any normal fantasy. Seeing his body distort, seeing it go from human to...to equine...well, that was something else entirely.

Trevor looked down over his body, still unable to believe how things had changed. Even in the dimmer lighting of the lab, he could still see the light flickering off of his shimmering black body. The image of his reflection - muzzle and all - looked back at him from his chest, and he could see just past that his cock.

His cock...

It can't be that big...it can't...

Yet it was. From a normal human - perhaps slightly overweight - he'd been transformed into a horse, and a stud of a horse for that matter. He was huge, hung to at least fifteen inches, and his balls were bigger than his fists, hanging down low enough that they were keeping his legs spread apart from their sheer size and weight. He could feel them tugging down at his crotch, so heavy, so needy...So big that he was tempted to play with them despite his terror.

But he didn't. He tried to raise his head instead...but he didn't do that either.

Why can't I move?

Trevor pulled at his new, rubbery arms, but they didn't move. All that happened was a tension of his body, a squeezing as his muscles tried to do something that was beyond their capacity. Despite being free of the tube, he might as well have been totally encased in a block of concrete for all the freedom he had. His arms, his legs, his head; everything was completely still, locked in place as he panted for breath. Even that felt simulated, as his heart wasn't racing anymore, and while he 'felt' scared, his body didn't have any of the feelings that came with that.

What's going on? Why can't I do anything?

He heard the sound of a mechanical door, the whooshing open-and-shut that always came in the sci-fi shows. Trevor once more tried and failed to move, and thus could see no more than the approaching pair of hooves as they came ever closer. When they were finally in front of him, he could see that they were massive, bigger than dinner plates, and leading up to thick, tree-trunk legs. He blushed as something soft smacked him in the forehead, and he realized that it was the other horse's cock.

"You...You've come through the transformation very well."

The cock smacked him again, bopping off of his forehead as the strange horse started circling him. Trevor couldn't shake the strange feeling of having someone else walking around him when he couldn't even move, but it was the same as before. His mind was nervous, but his body was utterly calm, his rubbery self occasionally squeaking as the fingers rubbed down his back, and then - humiliatingly - over his bare ass.

It got particularly bad when the bigger fingers rubbed against his balls, squeezing them and holding them in a huge hand. Trevor blushed beneath the rubber, but his cock throbbed all the harder. He didn't know if that was something being controlled, or if something in him liked it, but either way, he was utterly humiliated.

That same hand rubbed back between his ass cheeks, and Trevor continued to blush as that hand, those thick fingers, pressed between them against his hole. The feeling of sudden pressure back there, the sensation of having his hole teased and 'inspected' like this, should have infuriated him...yet his body only responded with more arousal, his cock swinging up to slap against his stomach, hard and surprisingly wet.

"Yes...very good. The transformation left you properly conditioned."

Conditioned for what?

"You will be a proper slave. And a good sex toy, for me, it seems."

WHAT?!

The horse clip-clopped his way to Trevor's front again, and this time, those large fingers pressed under his chin. He was forced to look up, going further up those thick legs, past a huge cock and a well-developed beer belly, past a chest of muscle and middle age, to a smirking horse muzzle. A natural horse, not a transformed one like him.

"Yes, yes, you will do well. Tell me, slave. How does it feel, in your new body?"

"Horny, big, strong."

The words burst out of his mouth before he could stop himself, and Trevor groaned. They were true enough - if only barely - but they were still humiliating to have said. The bigger horse pulled his hand back, and this time, Trevor was forced to keep staring up. It wasn't a terrible view, per se, until the stallion started waving his cock around. Then it was all he could see, and he couldn't help but feel weirdly turned on.

"I'm Dock. That's all you need to know, because you'll have rare enough occasion to say my name. And you don't really have one anymore. You're the slave, and you're the toy. That's all that you need to know."

"I..."

"You wanna say something, boy?"

"I...I'm not -"

"Heh, think you're not a slave? Come."

His body moved without any intent on his part, and Trevor gasped as he was pulled by his own disobedient limbs all the way over to Dock. Soon, he was being cock smacked, his cheeks and his forehead taking a 'beating' from the flaccid shaft. However, it was rapidly hardening, and this close, Trevor couldn't help but smell the bigger horse's musk. He hated it, but it was making his cock harder and harder the longer that he smelled it.

Dock chuckled at him, shaking his head a few times as Trevor was grabbed by the chin, his nose shoved right against the bigger stallion's balls. A few whiffs left him groaning, his eyes rolling back in his head from the smell, and his body starting to shudder for whole different reasons besides simple exhaustion.

"Heh, you like that, boy?"

"Ughhhh."

"I said, do you like that, boy?"

The fingers around his chin squeezed, and Trevor groaned. They were so tight, and most definitely not comfortable.

"Yes! Yes, I like it."

"Good. Now kiss your master's cock."

Trevor couldn't believe that he was going through with this. His body was completely out of his control, and soon, his lips were pressed to the head of Dock's cock. The flesh was firm against his lips, and as he pushed against it, his mouth opened on its own, taking the shaft in deeper. The spongy head seemed to grow as it passed further and further down his muzzle, until he felt the broad tip slap against the back of his throat.

The stallion pulled back and slammed in again, each time smacking against the back of his throat hard enough to make him gag. It was just so big, and he couldn't take it further. No matter how much his body tried, no matter how much he swallowed around the broad head at the back of his throat, it just seemed physically impossible.

Dock seemed to realize that as well, because after another minute of facefucking, Trevor was turned around and shoved against the ground, his face and chest down and his ass up. He felt big fingers dig into his rubbery ass, and he blushed as he felt a big glob of spit land against his asshole.

"You're gonna learn to love this, boy. That is, if you don't already, hehehe."

"What...what do you -"

"I told you, boy. You're a sex slave. And you're gonna be taking my cock, one way or another."

That same big cock head pressed against his ass, his hole stretching around it in a way that his throat had refused to do. Trevor groaned against the ground, but he couldn't move. All he could do was lay there as those fingers gripped his ass harder, that cock pressed against his hole more firmly. He whimpered, shaking his head back and forth as he was pushed at, his body stretching further and further until -

"Oooooh yes!"

Dock's moan was almost a relief, and would have been were it not for the intense stretching in his ass. If it weren't for the fact that he seemed to be a rubber horse now, he knew he would have been screaming. As it was, he could barely take it, his ass burning as he was pushed down and fucked, ruthlessly rutted by his new master.

Master...master...the word echoed in his head, repeating with each thrust into him by the bigger horse, that belly pressing down against his back in short order. Trevor moaned, despite himself, as that big cock opened him up further and further, big balls slapping against his ass and against his own massive sac with each thrust.

"That's it, boy...let it out...moan for your master."

And then he was moaning, his cock throbbing against his stomach and squirting pre down onto the floor. The rubber horse panted, groaning as his body squirmed futilely under the hard pounding he was getting. His ass cheeks jiggled, and as Dock started to sweat, Trevor's body started to squeak at the sliding friction between them. He groaned, his teeth clenched as he was filled again and again, feeling that cock pulsing, twitching inside of him.

And then, right then, it ended.

Dock moaned as he went over the edge, and Trevor shuddered as he was taken with him. His cock twitched twice before it blew his load all over his stomach and chest. A puddle formed under him, spreading under his chin and soaking him with his cum. The smell of it, and the hard panting above him, and the stiff rod inside of him, kept him throbbing even after his orgasm was over.

The soft, slimy feeling of the cock sliding out still didn't let him move, but Trevor...he honestly found it hard to care. He laid there, panting, as his master patted his ass a couple of times before starting to clip-clop away.

"Good slut...I'll be back later."

The End