Marshall: Fine! That's one. But I defy you to name...
Lily: I'm going to name 50. There's "makeup" sex, "breakup" sex, and "your friend just told you about a new-position" sex.
Barney: You're welcome.
Barney: There's also "revenge", "rebound", "paratrooping." You know, when you go out of town but instead of getting a hotel room, you go straight to a bar with the sole intention of hooking up with a girl so you have a place to stay.
Robin: Oh, you mean "banging for roof."