Three psychiatrists are having a drink after work, talking about their newest patients.

The first one says, “My most recent patient works as a telemarketer. She has a lot of hang ups.” The second one added, “I have a new patient who works at the sewage treatment plant. He’s into a lot of crazy shit.” The third one is silent, but after some prodding says “We’ll, I can’t really compete with you. My most recent patient is a statistician and he just has a standard deviation.”