Sam: Now wait a minute. Wait a minute. There are two mysteries going on here. First, Carla's been seeing this obviously very classy guy. And second, your pal's been avoiding two of you like the plague. Of course, that's the lesser of the two mysteries.
Frasier: Sam, you're talking about one of the most distinguished and accomplished men of letters I know, dating a common barmaid.
Sam: You're dating a barmaid.
Frasier: Well, she wasn't a barmaid when I met her.
Sam: Oh, that's right. That's right. She was a lunatic.