A guy and a girl met at a bar. They got along so well that

they decided to go to the girl's place. A few drinks later, the

guy took off his shirt and then washed his hands. He
then took off

his trousers, and washed his hands again.

The girl had been watching him and said, "You must
be a dentist."

The guy, surprised, said, "Yes, how did you figure that out?"

"Easy," she replied, "you keep washing your hands." One thing led
to another, and they made love.

Afterward, the girl said, "You must be a good dentist."

The guy, now with a boosted ego, said, "Sure, I'm a good dentist,
how did you figure that out?"

"Didn't feel a thing!"