You go to work on Rose's anus, thrusting your meat in and out as the minotaur grunts and moans. "Uhnn, you like this, don't you?" you ask the bull-man. Rose doesn't answer you, only moaning again. You were never very sexually aggressive, but you find yourself laughing at your soon-to-be conquest and taking glee in his discomfort.
You keep plundering the minotaur's hindquarters, but you notice something. At first, Rose's hole was broken-in enough for you to easily insert yourself, but it has slowly grown tighter and your shaft now fully fills his anus. The observation quickly passes as another wave of pleasure races up from your loins. You begin snorting and grunting as you draw close to climax. Both of you bellow loudly in simultaneous orgasm, Rose flooding the table with his seed as you unload into his depths.
Exhausted, you fall back, your shaft leaving a string of semen as it leaves Rose's rump. You fall down on your back, still hard, looking at the ceiling as you recover. You hear Rose turn to look at you, "Well, that was fun, especially after your tiny human dick changed."
"Changed?" you think, "What does he mean by that?" You force yourself up and look down at your loins. A hard, red rod extends from between your legs. You also see that your body is covered with short brown fur and your legs terminate in cloven hooves. You reach up to your head and discover horns reach out from your skull. You turn again to Rose. "What?" he lisps, "You think you can screw a minotaur on Pleasure Island and nothing will happen?"