Quote from Barney in Double Date
Marshall: Barney, why are we here?
Barney: Marshall, now that Robin and I are together, I've learned a lot about relationships by watching you and Lily.
Marshall: Thanks, man.
Barney: You're a terrible couple. Lily has taken all the man out of you. I used to think that's just every relationship. But what I've got with Robin proves that you can have a girlfriend and fully functioning male genitalia all at the same time.
Marshall: Okay, right. So, if Robin knew that you were here, she would be completely fine with it?
Barney: Are you kidding? She'd sprint down here with a purse full of singles and a poncho for the 10:30 Jell-O show. BT-Dub, I called ahead it's lime.