Old Man Goes To The Dentist.......

Old man goes to the dentist for his annual checkup. Not even a minute into it, the dentist suddenly stops and asks him. -Sorry, but I have to ask you this. Did you do a 69 last night? The old man is amazed!! -Doc, how did you know? The old lady was kind randy, but I flossed, brushed my teeth and used mouthwash. -No no, you breath is fine, it's your forehead that smells like shit!!