ME: I'm going to a cookie exchange.
HIM: What exactly is a cookie exchange?
ME: Well, dear, as the name implies, everyone shows up with cookies, and we exchange them with each other. You know, a cookie EXCHANGE?
HIM: So, does that mean you'll be bringing other people's cookies home with you?
ME: That is the general idea.
HIM: Why would I want to eat anyone else's cookies? That's like having an affair with a really ugly woman.
[By the way, he did end up eating other people's cookies. Should I be on the lookout for an ugly girlfriend now?]