when i was 17 and just graduating from HS my dentist asked me during an exam if i had a cough because there were marks at the back of my throat (soft palate area). i honestly didn't have a cough and hadn't had one so i said, "no". he didn't comment after i answered. i went home and looked in the mirror and sure enough there were a few red marks, like little broken cappillaries/brusing easily viewable when i opened my mouth wide and looked in. then. . . i graduated and entered college in the dental field. one day while reading in a textbook i came upon a section which noted "Features of noninfectious lesions caused by fellatio" and it showed a picture... a picture of the same marks i had at the back of my throat that day when i visited the dental office. DAMN - HE KNEW! he must've been ruling out that it was a cough. next time you are scheduled to go to the dentist and you've given a guy a good blowjob the night before remember that the dentist might be onto you.