Quote from Barney in Twin Beds
Barney: [reading the letter] "You and Robin, were a terrible couple. It just didn't work. Sure, you'll always love Robin, but remember other women? More importantly, remember other boobs? And all the cool stuff you can do with boobs? Nuzzle, juggle, honka-honka. I guess I'm just a hopeless romantic." Then there's just a bunch of drawings of boobs.
Ted: Uh-huh. You get it now?
Barney: Yeah, I get it. I definitely want her back.