It's a beautiful warm spring day and a man and his wife are at the zoo.
  She's wearing a cute, loose-fitting, pink spring dress, sleeveless
  w/straps. As they walk through the ape exhibit and pass in front of a
  very large gorilla, the gorilla goes ape. He jumps up on the bars, 
  holding on w/one hand (and 2 feet), grunting and pounding his chest w/the 
  free hand. He is obviously excited at the pretty lady in the wavy dress. 
  The husband, noticing the excitement, suggests that his wife tease the 
  poor fellow.
  The husband suggests she pucker her lips, wiggle her bottom, and play
  along.  She does and Mr. Gorilla gets even more excited, making noises
  that would wake the dead.  Then the husband suggests that she let one of
  her straps fall,  she does, and Mr. Gorilla is just about to tear the 
  bars down. Now try lifting your dress up your thighs... this drives the 
  gorilla absolutely crazy.
  Then, quickly the husband grabs his wife by the hair, rips open the door
  to the cage, slings her in w/the gorilla and says, "Now, tell HIM you 
  have a headache."