So a male doctor and a female doctor meet up at a convention and have some chemistry. The male doctor invites the lady doctor out for drinks. She agrees, but goes to the bathroom to wash her hands before they leave. They really hit it off at the bar, but again, she excuses herself to wash her hands. Eventually, they get back to his hotel room, one thing leads to another and they have sex. Afterwards, she gets out of bed, goes into the bathroom, and washes her hands again. When she comes out, the male doctor says, "You must be a surgeon."
The female doctor says, "Yes, I am. How did you know?"
"Because you're always washing you hands," he replies.
The female doctor paused. "Well, you must be an anesthesiologist."
The male doctor was surprised, "Wow! That's amazing. How could you tell?"
She shrugged and said, "Well, because I didn't feel a thing."
*rimshot*