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
thing 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 just tell him
the truth. 'It's called sexual intercourse, darling'.

Little Tony just 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!