A guy goes to the supermarket and notices an attractive woman waving at him.
She says hello.
He’s rather taken aback 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”
Now his mind travels back, to the only time he has ever been unfaithful to his wife and says :
“My God, are you the stripper from my bachelor party, that I made love to, on the pool table, whith all my buddies watching, while your partner, whipped my butt with wet celery ???”
She looks into his eyes and says calmly :
“No, I’m your son’s teacher”.