Little Johnny was staying with his grandmother for a few days. Hed been playing outside for a while when he came into the house and asked her, Grandma, what is it called when people are sleeping on top of each other?

She was a little taken aback, but decided to tell him the truth. Its called sexual intercourse, darling.

Little Johnny just said, OK and went back outside to play.

A few minutes later he came back in and said angrily, Grandma, it is not called sexual intercourse! Its called bunk beds!