In this clip from the the upcoming episode of How I Met Your Mother, Robin and Ted are driving each other nuts as roommates. They think maybe have sex will solve the problem... much like Barney thinks it will solve world peace.
Barney: Let's be clear: I don't love [Robin], okay? I just... miss her when she's not around, think about her all the time, and I imagine us one day running towards each other in slow motion and I'm wearing a brown suede vest.
Marshall, you're no Lily. Lily is a diabolical puppet-master, surreptitiously manipulating every situation to get exactly what she wants. She is pure evil, Marshall. You've got a good one; hang onto her