Marshall: Barney, no, I'm not going out with you ever again.
Barney: Come on! I'll teach you all my strategies!
Marshall: Oh, really?
Barney: My favorite, number seven: create a mystery about yourself. That way, they become so intrigued that they have to hang out with you all night.
Marshall: Oh, come on. Does that really work?
Barney: Maybe it does and maybe it doesn't.
Marshall: Damn it, that's intriguing! OK, I'm in.