Jeff sgrinned as the sensations started up again, and moved over to look at himself in the mirror. The change started slow, but he had ten minutes to fill. Obviously, specifying the breed had worked. The first changes were a shift in his horse parts to be more in line with a draft horse. His hands and feet got larger, and his body thickened and enlarged.
It took about two minutes before the first additional changes started to show, and Jeff was already shivering in pleasure. His chest was getting deeper, and the bronze-colored skin had a fine layer of golden hair over it. This thickened slowly into an even coat of shiny horsehide that continues up his neck. His face was starting to push out more, his head wider and thicker even though his skull seemed to be getting flatter - like a balloon deflating.
Powerful sexual sensations washed over him, and he realized he was rubbing absently at a much larger penis. The head flared out and flattened even as the shaft turned black and ropy with veins. Jeff had to turn his head slightly sideways now to look down, and he gasped at the enormous Clydesdale stallion's equipment that he was masturbating. It was hard to think of anything else, yet he could not make himself stop. His hands began to lose sensation, and as he stared into the mirror his head became almost completely equine. It was fascinating to watch, especially when his eyes shifted and enlarged into huge horse's orbs. Colors faded, and everything got a slightly grainy look. His nostrils flared, soft and flexible, and his ears twitched.
Pressure was building tremendously in his crotch, his massive black horse cock arched out in front of him. The room started to flicker around him, getting darker, and noises started to build. He smelled strong animal odors, including a heavy stallion's musk that he automatically knew was his own smell. And human sweat, fear, lust - where was all that coming from? It was impossible to stop masturbating now, too close to climax, but a few stray worries surfaced. Had he gone too far? Sixty percent animal was making him mostly horse.How would reality adjust for that?
He shuddered suddenly, stomping his hooves and whinnying as he shot a massive load of thick equine semen that splattered against the badly stained canvas of his tent stall. As he did, there was applause and laughter from behind from many people and a gruff man's voice said "And there you have it, folks! Third show today, and he never fails to please. Last show one poor lad was standing in direct line of fire! "
Panting, Jeff turned slightly and found that he was in a small wooden enclosure, kind of a mini-corral, with the canvas wall in back and spectators crowded around the other three sides. The man who had been talking was grinning at him. "Good boy, Goliath! OK, folks! Any brave enough can go in and handle our lovely stallion for a few minutes before the next show starts!"
As the afterglow of pleasure faded, Jeff was astonished when a half-dozen people came into his stall and started to pat, stroke, and even fondle him as if he were some dumb beast! But then 'memories' returned, and with a dull sense of horror, the former human boy realized that he was now, and had been since birth, a humanoid Clydesdale freak in a travelling carnival. As far as the world was concerned, he was just a strangely deformed horse!