A guy shopping at the supermarket notices an attractive woman waving at him. She approaches and says hello. He's rather taken back because he can't place where he knows her from. So he says, 'Do you know me?' To which she replies, 'I think you're the father of one of my kids,' His mind raced back to the only time he had ever been unfaithful and says, 'Are you the stripper from my stag party that I shagged on the pool table with all my mates watching..while your partner was poking my arse with the thick end of a pool cue??? She looks into his eyes and says calmly, 'No, I'm your son's teacher.'