Actor Seann William Scott had the worst case of sex education - when he heard his parents making love upstairs.

The American Pie 2 actor remembers the day vividly and hopes he never comes across any further evidence that his parents still have a sexually active life.

He says, "If I saw my dad even look at porno it'd be over with our relationship. I'd either have a heart attack or throw up. I remember one time my mom and dad were hanging out and they were like, 'Why don't you go over to Matt's house and play basketball?' I was like, 'I just played an hour ago'.

They said I should go back and play again. So I went downstairs and was like, I don't want to play basketball. I turned on the TV to watch some Price is Right and I freaking heard the bed bang and everything. I ran out of the house like Forest Gump."