After an excitingly hot 69 session with his girlfriend, Jerry remembered he had a dentist appointment.  He was afraid the dentist would smell pussy on his breath so he brushed his teeth several times, gargled a crapload of Listerine and flossed very thoroughly as well.  As he arrived at the dentist, he sucked on a fistful of strong mints.  His turn came up and the dentist said take a seat.  

Feeling confident and relaxed Jerry opened his mouth wide.  The dentist got close enough and said, “Man did you have a 69 before you came here?”

Sheepishly Jerry said, “Why?  Does my breath smell like pussy?”

The dentist replied, “No, your forehead smells like shit!”