David began to admire his donkey cock and the feel of animal style sex. As he thrust deep in Stella's vulva, his leathery sheath protruding between her sex lips the animal lust wiped away his human will.
Finally he dismounted and the long donkey cock slid out like a rubber snake. Standing on all four he felt sticky and wet on his belly and sheath from the juices coming out of Stella. Briskly his tail swished in a lusty desire to mount again.
The donkey lust taking final hold over any human thought and will. David stood swinging his hearty member. The vaginal slime cooling is the breeze of movement, he shivered.
Suddenly something slid in front of him and over his face. Turning easily to see Henry Wifflephaffer was holding a rein attached to David's new donkey halter. All this might have frightened the human but the animal stood as if all was normal.
"Good boy David, you are a fine stud! I have plans for you that in time you should find to be fun. Donkeys like to feed and when full fuck till dark. You dear boy have grown to be the largest fourteen hand high Donkey I ever saw! You height should give you advantage for mounting even draft mares, Yea your one big fucking Donkey, Hahahaha!"
Part of David felt fear at being an animal, and at the same time part felt a pleased delight in being so big.
As David stood still enjoying the wafting scents of Stella's ripe vulva, Henry knelt down in the straw.
"Hmmm, about twenty six inches long, five inches round at end, sixteen inches around his sheath. Damn it David you got the sheath and cock of a draft horse!
David felt happy as the words moved in his own thoughts. He had only animal lust driving his every wish. All thoughts of past self was being dissolved into only agressive desires of personal needs.
Stella was about crosseyed from being fucked for over and hour with a draft horse's cock. She brayed and turned to leave the stall as David bounded on top of her trying to remount.
Stella gave no chance and bolted from the stall and out the door knocking Henry on his butt. David stood braying as if a spurned lover.