Rebecca: And how do you know that I haven't been to bed with Robin? Did Sam tell you that?
Carla: No. I'm a woman. A woman knows.
Frasier: You know, I must say I'm with Carla on this one. I mean, there's nothing wrong with two people getting to know each other before they have a physical relationship.
Rebecca: And how did you know?
Frasier: Well, I'm a psychiatrist. A psychiatrist knows.
Tony: What are you waiting for, Becky?
Pete: Hit the sheets already, kid.
Rebecca: Sam.
Sam: Pool players know.