Barney: You've been betting on us? Like we're a couple of hobos fighting over a sandwich in some psycho preppy kid's backyard?
Lily: No, this is just what happens in marriage. You get bored. You run out of things to do.
Marshall: We were making models.
Lily: You single people are out there with the drinking and the sleeping around...
Marshall: Model airplanes.
Lily: The grinding and the bumping and the hot sweaty bodies.
Marshall: ...with little propellers that spin.