Grannies don't know everytihng
Grandmas Don't Know Everything
He'd been playing outside with the other kids for a while when he came into the house and asked her, "Grandma what's that called when two people sleep in the same room and one is on top of the other?"
She was a little taken aback but she decided to tell him the truth.
"It's called sexual intercourse darling."
Little Tony said "Oh OK" and went back outside to play with the other Kids.
A few minutes later he came back in and said angrily "Grandma it isn't called sexual intercourse. It's called Bunk Beds. And Jimmy's mom Wants to talk to you."