Barney: Have you noticed how beef ribs used to always be disgusting, and then recently they found a way to make them really delicious instead?
Marshall: Okay, Barney. I'm gonna go ahead and ask you this head on. Are you happy with Robin?
Barney: Are you kidding? How could I not be happy with Robin? It's Robin!
Marshall: So are you happy?
Barney: I can't believe you'd even ask me that. I mean, yes, we fight all the time, but, you know what they say
about relationships. "Every moment's a battle."
Marshall: So are you happy?
Barney: And you know what goes hand-in-hand with fighting, the make-up sex, which is different when you're in a loving, long-term relationship.
[flashback to Barney and Robin in bed:]
Barney: Heads, we have sex. Tails, we order a whole pizza and just lay here moaning.
Robin: Oh, great. Let the coin decide.
Barney: [flips coin] Which was pizza again?
Robin: Tails.
Barney: It was tails.