A married couple at the zoo walks past a gorilla enclosure.
Says the woman, 'Mark, do you know that gorillas are the only animals which resemble men in their behavior? Look, seeing that no one is looking, I'll expose one of my breasts to it and see if he reacts just as men do.'
Mary then exposes one of her breasts, and sure enough, the gorilla gets excited and grabs the bars of the enclosure as if it wanted to break free.
'See....' says the woman, 'Now I know why you react the way you do; men can't control their animal instincts just like gorillas can't.'
Says Mark, 'Now expose both breasts and let us see what happens.....'The woman exposes both breasts to the gorilla and it gets very excited and is now desperately trying to escape from the enclosure.
Says Mark, 'This is incredible! Now pull your jeans down, turn around and expose your butt and let us see what happens....'
The woman pulls down her jeans, turns around with her butt to the gorilla, which by now is extremely aroused, breaks free from the enclosure, grabs the woman and starts yanking the clothes off her.....
The woman yells, 'Mark, what do I do now? Please HELP ME!!!'
Mark replies, "Now, tell him you have a headache. Let us see if gorillas and men are the same."