Niles: But surely you don't intend to let the promise of wealth and exposure lure you into her bed.
Frasier: It's not gonna come to that. It's all about the dance. It's all about the possibility of sex, the promise that's never delivered that keeps them tantalized. One only needs to know how not to cross the line.
Niles: Excuse me, but didn't you sleep with her once?
Frasier: Yes, that's how I know where the line is. I almost feel sorry for her. Just another helpless woman suffering from an unslakable thirst for...
Frasier & Niles: Crane!