Father and son (both adults, I should add) are at a party with various family members, friends, workmates etc. Workmate is regaling son with rather dirty stories of his sexual exploits. Son says to workmate 'Well if you want to get a chick off bigtime...use an electric toothbrush on her clit, it makes them explode'. Father overhears this, turns round with his mouth open and splutters 'How do you know so much?'

Because I told him. LOL