Jeff just wanted to go for it. No messing around. He was getting extremely horny and wanted to jerk off. But he wanted to so it as a donkey with no arms. No hands. No fingers. While being forced to be on all fours. With a gigantic, ugly, black animalistic hose with giant black churning balls that could be seen from behind. No ability to speak a single human word.
Most male adult jacks grow to be around 1,100 ponds. He wanted to be even heavier. A bit on the fat side. 1500 should fo it. Just 500 lbs short of a ton! With nuclear-yellow teeth turning green and black around the edges. An unwashed, dirty, smelly, flea-ridden, fly-infested body that could be smelled by a normal hunan from a mile away.
He wanted to be gross and disgusting. Physically unable to do anything about it. To be trapped or locked with such a body, and nobody the wiser as to who he was....it was the stuff of nightmares. He had to try it, just to see!
He launched the settings, stood up. And immediately found himself on all fours! "Eerrghh hhhaaww, " he said, instead of the words "i did it!" escaping his new large, black rubbery lips.
"Errrgghh hhhaaw, " he tried talking again, just to test his new-found inability to speak.
He next noticed his eyesight was quite poor. Colors washed out and his vision split. His hearing and sense of smell was much enhanced. What he was smelling right now, was his new middle-aged male donkey musk.
"Oh god, it worked!" He thought. His mouth tasted sour. Very sour. He wanted to brush his teeth to freshen up. Not without hands, he couldnt. The thoughts made him incredibly horny.
Jeff tried reaching with his left hand to begin jerking off. But that left front leg was meant to keep him standing, especially one so fat. A 1500 pound beast that he now is. He almost toppled over.
"Oh god, it burns! Its churning!" His hoselike dark penis unfurling at an uminaginable length. He wanted desparetly to grab it. To at least rub it on something. But his libido was so high, he was just stuck frozen where he was in the middle of the room while the wild-eyed appendage started started dancing up and down on its own in long, slow arcs. Slapping his white-furred underside. Beating and slamming into his low-hanging fat belly.
Jeff's brain was going into overdrive with much pleasurable activity. The dick getting harder and harder. Longer and longer. Jeff's mind abuzz with the gross image of gray-furred male jackasses, of which he is now one! One even larger and more animalistic than most!
"Haaawwwww!!!! Eeerrrgghh hhhaawww!!!! Eeerrgghh hhaaawww!!!! Eeerrrgghhh hhhaawww!!!" Jeff burst forth with his vocalization, just as his dick burst forth with round after round of thick, yellowish-white, sticky, smelly old donkey cum.