Season 6, Episode 11: "The Switch"

And the amazing thing is she eats like there's no tomorrow.

I've never seen an appetite like this. Desserts, everything.

-I don't know how she does it. -Maybe she's bulimic.

-What? -Bulimic, you know?

-Kramer, she's a model. -Exactly.

Well, I have noticed she does tend to go to the bathroom...

-...right after we finish eating. -Yeah.

There you go, monkey boy. Come on.