Niles: Oh look, look, that must be Roz's coffee companion. Wow! He's really handsome, isn't he?
Frasier: "Wow!" Did you say "Wow?"
Niles: Good lord, I did. I've never said "Wow" when describing another man before. I wonder if that means something.
Frasier: Oh, absolutely. It means you're a gay man. Your life with Maris was a big charade and you should have come out of the closet years ago. Are you going to tell Dad or shall I? [laughs]