Barney: Lily, here's the thing. It's my apartment, and I need to assert my dominance as a man.
Robin: Don't ever say that to any girl ever.
Barney: Too late.
[flashback to Barney and Quinn in his apartment:]
Quinn: What did you just say to me?
[present:]
Robin: She gave up her apartment for you!
Lily: You said that to her?!
Barney: Okay, you know what? I don't have to sit here and take this from you ladies. I'm going to Ted's. The man cave, where guys can be guys.
[later, at Ted's:]
Ted: Assert your dominance?
Marshall: It's like you have no respect for women.
Ted: What is wrong with you?
Marshall: You have a mother!
Barney: You guys, too? I'm going to the Y for a shvitz.