Quote from Barney in Knight Vision
Ted: Look at this, your wedding weekend. Barney: I know, this close to finally having sex again. It's been forever. Ted: Oh, you and Robin been abstaining? Barney: Talking about you, Ted. Here's the deal. Every hookup at a weekend wedding is decided at Friday night drinks. Get stuck with the wrong girl tonight, the only action you'll get all weekend is a self-five. And I don't mean the cool kind. [laughs] Self-five. That's the cool kind.