Who's your Daddy?
A guy is at the supermarket when he notices that the rather good looking blonde behind him has just raised her hand and smiled hello to him. He is rather taken aback that such a good looking woman would be waving to him, and although familiar, he can't place where he might know her from, so he says "Sorry, do you know me?"
She replies "I may be mistaken, but I think you might be the father of one of my children."
His mind shoots back to the one and only time he was unfaithful.
"Christ!" he says, "Are you that strip-o-gram model from my bachelor party that I screwed on the pool table in front of all my buddies while your friend whipped me with some wet celery?!"
"Nooooo", she replied slowly, "I'm your son's Religion teacher."http://img.photobucket.com/albums/v25/cajunguy/Thud.gif
Step One: Insert Foot Into Mouth
Step Two: Bite Down Hard