A guy goes to the supermarket and notices a beautiful blonde who waves at him and says hello. He's rather taken aback, because he can't place where he knows her from, so he asks "Do you know me?" To which she replies "I think you're the father of one of my kids" now he thinks back to the only time he's ever been unfaithful to his wife and says "OMG are you the stripper from the bachelor party that i laid on the pool table with all my buddies watching, while your partner whipped me with wet celery and stuck a carrot in my butt?" She replies "No I'm your sons math teacher."