Wait a minute! Nostrils flaring? Still masturbating his huge bull cock, Ben focused on the mirror again. Yeah, his nostril were flaring all right - they were also much larger and deeper, and his whole lower face looked swollen. He knew he should stop and go change the computer settings, but the sensations were just too intense. Besides, he could fix things afterwards.
A shudder of pleasure exploded in his crotch, and curiously, shot down his legs and throbbed in his feet. His shoes began to get tight, and he kicked them off without missing a stroke. Another shudder, this time up his back and into his forehead. Ben gasped as two lumps pushed out from his forehead.
The sexual pleasure was almost too much to stand now, and his testicles swelled out llike tennis balls, hanging almost to his knees. He shuddered and gasped as the bumps pushed out into bovine horns, and his face pushed halfway out. he was recognizably becoming a bull, though his hands remained unchanged. Or had they?
His massive bull cock was easier to hold, and he looked down to see that he now had larger, three-fingered hands that were turning black even as he watched. Three fingers? Maybe he should stop now. Yes, he should stop now. Another shudder pulsed down legs that were fully bovine, and finished the transformation of his feet into huge cloven hooves.
His skin was darkening as well, thickinging into black hide that was also sprouting sleek black fur. Stop. had to stop. Pressure was building in his balls and dick now, and release was coming. Precum squirted out, more than a pint of watery liquid.
He looked up at the mirror and saw a bull's head fully formed, bull's eyes regarding him calmly. Had to stop now. He realized that he had grown at least a foot taller, and was bulking out quickly. What had happened? This was supposed to just be a bull cock, not the whole package! He WOULD stop. But it was too late - he stiffened suddenly as a thick jet of semen shot from his massive organ and splattered on the wall and ceiling. He gasped as the final changes throbbed all over his body.
As the intense orgasm faded, he looked in the mirror and discovered that he was: