Little Tony was 7 years old and was staying with his grandmother for a few days.
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 sex, 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 sex. It's called Bunk Beds.
And Jimmy's mom wants to talk to you.'