[Fry opens his mouth]
Dr. Zoidberg: No, no, not that mouth.
Fry: I only have one.
Dr. Zoidberg: Really?
Fry: Uh... is there a human doctor around?
Dr. Zoidberg: Young lady, I am an expert on humans. Now pick a mouth, open it and say "brglgrglgrrr"!
Fry: Uh... brglgrglgrglgrrr!
Dr. Zoidberg: What? My mother was a saint! Get out!