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 explains the Cheerleader Effect using a collection of women at the bar. One of which looks strikingly a lot like Marshall. Oh and Barney finds out he might be a father.
Barney: Lesson one, lose the goatee, it doesn't go with your suit. Ted: I'm not wearing a suit. Barney: Lesson two, get a suit. Suits are cool, exhibit A. [points to his own suit] Lesson three, don't even think about getting married til you're thirty.
