Kitty: Um, Midge, is something bothering Bob?
Midge: Oh, he's uncomfortable around you and Red now that Donna and Eric... know each other. If you know what I mean. You see, I'm using the word "know" in a different way here.
Kitty: Uh-huh?
Midge: It's a pun.
Kitty: It's not a... Okay, Midge, good pun. [laughs] Bye-bye now. [to herself] Oh, they are nuts.