Sitting, looking, watching the change you feel so warm and fuzzy a feeling as hair sprouts and toes become hoofs. People talk but your mind is now a one track thought pattern. Blotting out the world you watch with great enjoyment the change as you enter the genus of Equine.
Shivers of thrill pulse down your body as your eyes go wide with the presentation of a true pony sized penis. So quickly it grows out of the sensual sheath you had been probing just seconds before. Up and out, first limp it slithers to hang down over your hairy thigh. Stiffer and harder it gets and comes to stand at attention, ready and making you feel more willing to try it out.
Doctor and Lab Tech watch quietly as your body makes bigger changes. Head grows out to form a muzzel. Nostrils flare out wide to ultimatly gulp air as you run. Lips thicken but are flexable to gather the food for this growing body to ingest. Teeth too fall out as huge slab like teeth made for your lifestyle ahead move into place.
Fingers and toes are blaack solid hoofs as you wiggle them and fetlocks move. Checking the new forelegs, knees, and shaking your head the desire to fall from where you sit becomes a real urge.
At last you need to try and falling forward the hoofs hit the floor with a solid kerthunk! Walking in a small circle it's high time to see what you are. Happiness feeling race through you as the form and stance appeal to you somehow. The pony penis still flared rigid feels so neat that after a few minute your body stretches out long and with deep intent.
Urges of ponydom drive the rigid penis to rise and swing till the hearty testicles can hold back nolonger. A feeling of lust builds to mountainous perportions as the drips of pony cum soon give way to globs of semen shooting from the shaft.
"He's ready!" says the Doctor.