So they go back to her place and he goes in the bedroom. She goes in the bathroom and starts scrubbing up like she's about to go into the operating room. She scrubs for a good 10 minutes. Finally she goes in the bedroom and they have sex for an hour or so.
Afterwards, the man says to the woman, "You're a surgeon, aren't you?" "Yeah, how did you know?" The man says, "I could tell by the way you scrubbed up before we started." "Oh, that makes sense", says the woman. " You're an anesthesiologist aren't you?" "Yeah", says the man , a bit surprised. "How did you know?" The woman answers, "Because I didn't feel a thing."