Man takes his kids to the zoo. they are standing next to the Gorilla compound when the father throws a grape at the gorilla. the gorilla picks it up, looks at it, sticks it up its ass, takes it out and then eats it. the man is horrified. He tries another grape. Same thing. Gorilla picks it up, sticks it up its ass, takes it out and then eats it.
The Zoo keeper comes walking along and the man says, 'Whats the matter with this gorilla? He's disgusting. I threw him a grape and he sticks it up his ass before he eats it!"
"Harry the Gorilla is very clever sir," Says the Keeper. "Someone threw a peach in there once and he couldnt shit the stone out....now he tests everything!"