Mitch felt his stiffened shaft of a body forced into the jennet donkey who was then mentally, Karissa.
His foolhardy wish had him as the male organ of some stallion, doing and feeling what it might be like being as he had thus become. Mitch screamed out of horror, terrified that his humanity was gone and he might spend a lifetime as the male organ of some beastly stallion.
A harsh shove had his shaft body sunk deep into Karissa, she tightening her vagina muscles to grab at and grip, holding the shaft in where she wanted to feel it according to her equine sense of joy.
Two more sharp jabs and his eyesight became murky as the sheath was jammed tight to those vulva lips of one excited donkey jennet. He would blink his black skin eye lids, trying without the use of any hands to wipe the slime from them.
Several more thrusts and from somewhere behind his feet came the rush gush of some salty tasting slime, the cum and onslaught of stallion semen. It felt to him as if he were regurgitating up some meal, but instead it was the semen spewing from his cock-head lips that he felt and had a taste.
The stallion sated and spent he pulled back, stepping off from his mare and mate.
With this the wish was fulfilled, the sensation known to Mitch, and he found himself bathed in semen, vaginal fluids, and setting naked on the ground beside a wanting and anxious jennet, she looking for yet another to fill her lusty voids.