"Now lets see what we can do about that puny human cock!", Madam Illusia said theatricality, while pointing at Tyler's penis (which looked comically small in front of the four sagging brown leathery bull testicles he now sported). His penis as hard as a rock now, even though he had just came. His new balls really were making him horny. Tyler was absolutely ashamed.
The madam spun the wheel and Tyler gulped. As the wheel spun he noticed his swollen balls felt sore; he was still incredibly horny. He used both hands by could only cradle 2 of the four balls. Man, they were huge! And so heavy!
Tyler watched the wheel turn slower and slower. He couldn't believe it. He was only going to have a human penis for a few more moments. What animals genitals would he now sport for the rest of his life?
The wheel stopped turning and Madam Illusia loudly announced in a gleeful voice "Donkey!". The audience applauded as Tyler felt light headed. He was going to have the cock of a dirty smelly common barnyard donkey. It was too much. He was absolutely terrified.
Tyler felt a bit light headed and he felt his penis get harder. It was throbbing. He looked down and saw it was about an inch longer than normal. It was visibly throbbing. With each throb he saw his cock get a little bit bigger, longer, thicker. Tyler moaned. It felt so good. He wanted to jack off so badly, his bull testicles fueling his libido, but Madam Illusia had not given him permission. He looked down again. His cock was about 10 inches long now and quite brown and dark. His head also looked a bit flattened. God, he though, he was going to have an animal penis for the rest of his life!
Tyler closed his eyes. He was so horny and his heavy swollen balls ached for release. His growing penis felt like there were invisible hands over it, slowly tugging it, making it longer, bigger, and deforming it into a donkey cock. He looked down and saw his cock was now pure black. It was ragingly erect and over a foot long. His head was completely flattened. He noticed he had a thick ring around his penis about half way down the shaft. Lastly he noticed a big bunch of black skin at the base; his new sheath. After a few more seconds and a few more inches, Tyler's new donkey cock was complete. It looked nothing at all like a human cock. He was disgusted and humiliated.
"Alright Tyler. You can pleasure yourself. I know you want to!". As soon as she said that, his hands flew down. His cock felt absolutely enormous, and the skin felt much thicker, like leather. He brought up one hand to his nose and noticed a thick musky animal smell. His hands flew up and down the shaft. It only took a few stroked until he felt his heavy balls pull up. He shot load after load after load. After Tyler was done, he looked down. His cock was smeared with semen and he saw it slowly curling back up into his new sheath. The load was all over the stage floor. It looked to looked about 20-303 cups worth. It was chunky, yellow, and it stunk. Gross. His first load of bull semen.
"Well done Tyler. You will need to do that multiple times a day or else your balls will be very sore! How do you like your new cock? Its quite big and smelly, huh?"
"Please Madam. Change it back. Its so nasty. And im so horny i cant think straight!"
"Haha, no Tyler we are just getting started. Next were going to change your...."