A guy and a girl meet in a bar, they get to talking, he mentions that he is a dentist, so one thing leads to another and they go back to her and have sex. Exhausted after a great session of bodily enjoyment the Dentist falls back and puts up a cigaret. "That was great", he sighed. "Yeah, you must be a great dentist", says the lady. "Why?" "I didn't feel a thing…"