Seeing the girl he had picked up for a one night stand, he stepped away from her, she mostly changed to look like a female donkey. He still feeling aroused and horny, saw his penis, it then much darker of skin coloring, the length greater as was the girth around. He feeling highly elated by his sexual frolic, saw the circumcision from his human birth had changed, the end of his enlarged penis looked bestial, flat ended but with a narrow ridge to his glands.
Penis changed, he too combed his stiffening fingers through the thickening pelt he wore of donkey fur covering then his entire body.
Wiggling of donkey-like ears only excited him, e realizing he should be horrified by all the changes, he could not muster any feelings other than a want of continued sexual pleasuring.
"Please, may we do it again!" Ken asked of Cat, he hunching his legs as human feet continued to grow longer and his thighs became a strong coils of donkey muscles.
Cat was more than willing, she turned her donkey head and looking back at her horny stud, she let squirt a short stream of her urine, it adding to the room some wild scent to drive any equine male mad with lust.