Frasier: Sam, your whole life, has been a string of meaningless, albeit enjoyable, sexual encounters. Now, for the first time, you're engaging in a meaningful, productive pursuit... See, it's a common conflict between what we call recreational sex and procreational sex.
Sam: What?
Frasier: Well, dirty sex and clean sex.
Sam: Oh.
Frasier: Now, it is this conflict that is making you unable to function.
Sam: Oh. Oh, yeah. That's good. All right. Wow. For a minute there, I thought maybe there was something wrong with the seal on my microwave.