Barney: Oh, you fight. See, Robin and I never fight.
Ted: Of course you do.
Barney: No. And here's the secret. Every time it looks like we're about to get into a fight...
[flashback to Robin and Barney in his apartment as he eats breakfast:]
Robin: Um, why is there a bag of panties labeled "April 2008" in your closet?
[Barney puts his newspaper down, stands up and walks out of his apartment; present:]
Ted: So any time you think you might have a fight, you just get up and leave?
Barney: 100% effective. Can't fight if you're not there. That's what Gandhi taught us.
Ted: Boy, that's not true.