A man and his wife are at the zoo. As they walk through the ape exhibit, they pass in front of a very large, hairy gorilla. Noticing her, the gorilla starts bouncing around his cage. He jumps up on the bars and, holding on with one hand, grunts and pounds his chest.
The husband, finding this funny, suggests that his wife tease the poor primate. The husband suggests she pucker her lips, wiggle her bottom at him, and play along. She does, and the gorilla gets even more excited, making noises that would raise the dead. Then, the husband suggests that she let one of the straps to her dress fall to show a bit more skin.
She does and Mr. Gorilla nearly tears the bars down. "Now, lift your dress up to your thighs and sort of fan it at him," says the man. She does, driving the gorilla absolutely crazy to the point at which he starts doing flips.
Then, the husband grabs his wife, throws open the door to the cage, slings her in with the gorilla and slams the cage door shut.
"Now tell HIM you have a headache."