David and Chris were already bored when the announcement came over the speaker. David decided to head into the zoo. "I'm not gonna wait for the stupid teachers to make up thier minds. Let's go look on out own."
They took a side path past the gift shop, and walked over to the closest exhibit. Chris looked into the habitat. "Oh, gross! Those chimpanzees are pissing on each other!" David grinned. "Heck, I saw them through shit at people, too!"
Chris moved closer to the bars, frowning a little. A couple of the chimps looked really interesting. They had boobs, sorta like human women. Oh, that was sick. What was wrong with him. Damn! He was getting a hard on! But something felt weird in his crotch.
"Hey, dude! WHatcha waiting for! Let's go look at something else." David tugged at his arm, but Chris stayed put, pressing hard against the cage.
"I gotta get in there!"
David laughed. "Yeah, right. Come on, stop screwin' around!"
Pushing his friend away, Chris turned suddenly and ran around the side of the Chimpanzee habitat. He had to get in to get to the females! David caught up with him just as he started to open the Emergency door.
"Don't do that! You'll set off alar..." A loud buzzer went off as Chris yanked open the door and went inside. David lunged after him, and they both went tumbling into the habitat.
Chris scrambled up to his feet as two of the chimps came over to investigate. One was the first female he had seen from outside, and he found himself stripping off his clothing and stumbling toward her. The female jumped up and down and shrieked, and then turned to present her rump to him. There were some gasps and shouts from outside as people saw them inside, but Chris could only think of the female. Even seeing that his penis was black and shaped different didn;t faze him. A chimpanzee dick was perfect for the chimpanzee cunt!
He thrust into the female and gasped as he began humping. Clutching her with his arms, he had the odd sensation of shrinking. Smells and sounds were getting more intense, and he felt stronger. His arms were getting dark with hair, and he realized that his whole body was growing black fur.
Unable to stop, he cried out in horror as he felt his face and skull altering, but the sounds were the grunts and hoots of a chimpanzee. When he finally shot his load into the female, he was able to pull out. He was fully changed into a chimpanzee! Some scared yelling came from behind him, and he turned to see David in the corner of the habitat, still human, but faced with two of the males!