Young 9yr old Charlie was staying with his Grandmother for the week-end and he asked his Gran "What is it Gran, when two people sleep one on top of the other?"
She was taken aback and decided to tell him straight, "Well dear,It`s called `Sexual Intercourse."
"Oh" said Charlie, and went outside to play with his friend next door. A little later he ran back into see his Gran.
"You`re wrong Grandma" he said angrily, "It`s called Bunk-beds,