Frasier: Why so glum?
Roz: Why else? The weekend's starting again and I don't have a date.
Frasier: Oh.
Roz: Do you know how long it's been since... you know. I've probably forgotten how.
Frasier: Oh, no, Roz, I'm sure it will come back to you. It's just like riding a bicyclist... bicycle.