Rebecca: Oh, shoot! It's a minus! I'm not pregnant. Well, we only started trying last night. I guess we can't expect to get pregnant the first time.
Sam: Well, I thought that's what the fourth and fifth times were for.
Norm: Fifth time. You imagine that?
Cliff: I'm only up to three.
Rebecca: I just want to be pregnant now.
Lilith: Rebecca, why don't you approach this from a scientific point of view? Make a simple plot-point graph, and chart your basal temperature at a fixed hour each morning. After a couple of months, a pattern will emerge, thereby making your peak fertility days absolutely predictable.
Rebecca: Good idea. Thanks, Lilith!
Sam: Whew, boy! You guys went through all that?
Frasier: No, we just got ripped one night and tore one off. Remember that, sugar, huh?