A man and a woman met at a bar. They started getting along really well and they decide to go to her place for a drink.
A few drinks later, the guy took off his shirt and washed his hands. He then took off his socks and washed his hands.
The woman looked at him and said, "You must be a dentist."
Flabbergasted, the guy responded, "Why yes! That's amazing; how did you determine that?"
The woman replied, "Easy. You keep washing your hands."
Well, one thing led to another, and they migrated to the bed. Things became more and more passionate and they made love.
After their passionate deed was done, the woman remarked, "You must be a GREAT dentist!"
The doctor was very surprised, and said, "Yes! Yes! I sure am a great dentist. Wow! You amaze me! And how did you know THAT, my dear?"
His lover retorted, "That's easy. I didn't feel a thing."