10yr old twins were staying with grandma for a few days. one day they asked her, 'Grandma, what's that called when two people sleep one on top of the other?' She was a little taken aback, but she decided to tell him the truth. 'It's called sexual intercourse.' The day after they went home one of them called her, very upset,
[spoiler]'Grandma, it isn't called sexual intercourse. It's called Bunk Beds. Now we arnt allowed to share a room!"[/spoiler]