Barney: Whatever. Did you find out why I'm the one guy in this entire bar she seems to despise?
Marshall: I did, um... You're not going to like the answer.
[flashback to Marshall talking to Karina at the bar:]
Karina: My last three boyfriends were Wall Street guys. Bastards. So, I vowed never again to date a guy who wears suits.
[present:]
Barney: Huh! Okay, well, that's easy. All I have to do is stop wearing suits.
Robin: Oh, that's all, Barney? Come on, you're never not in a suit.
Barney: True. But for those... I mean, for that... I mean, for her, I will stop wearing... Wait for it.
Robin: We know you're going to say "suits."
Barney: ...suits.
[Marshall and Lily gasp]