A man and woman meet at a bar and over a few drinks they get along so well that they decide to go back to her place.
A further few drinks later, the guy takes off his shirt and then washes his hands. He then takes of his trousers and washes his hands again.
Watching him, the woman says, "You must be a dentist."
Surprised, the guy responds, "Yes... how did you figure that out?"
"Easy," she replies, "you keep washing your hands."
One thing leads to another and they make love. Once they're done, the woman says, "You must be a really, really good dentist."
The guy, now with a hugely boosted ego, says, "Well yes I think I am, how did you figure that out?"
"I didn't feel a thing!"
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