Janitor: Hey, pal.
Woman: Excuse me, Doctor.
Janitor: Oh, no, I'm not a doctor. I'm a janitor.
Woman: Oh. I just assumed because of the coat.
Janitor: Right. Well, janitors wear white coats around here too.
Woman: Well, you guys do a great job keeping this place clean.
Janitor: We thank you.
J.D.: No, I'm a doctor. Look at the books, woman.