Frasier: Trick or treat, everyone. Well, rather than let Freddy have all the fun, we decided to get dressed up, too.
Norm: Who are you guys supposed to be?
Lilith: See, Frasier, I told you they wouldn't know.
Frasier: Well, I'm Dante Gabriel Rossetti!
Lilith: And I'm his sister, Christina. The Rossettis are our favorite figures from the Pre-Raphaelite Brotherhood.
Cliff: Oh, yeah. The Pre-Raphaelites.
Norm: Yeah?
Cliff: Yeah, a group of 19th century artists and writers who held an almost-childlike submission to nature.
Lilith: That's very good, Cliff. How would you ever come to know that?
Cliff: Ah, I came across it at the library.
Norm: Yeah, going through art books looking for paintings of naked babes, huh?
Cliff: Really liked 'em fat back then, didn't they?