'The Front Porch' - Season 4, Episode 17
Ted is shocked to learn Lily was responsible for many of his break-ups.
Air Date: March 16th 2009.
Lily: Wait a minute. Those are your pyjamas? You sleep in a pyjama-suit?
Barney: Of course. What else would I sleep in?
Ted: A coffin.
Barney: I like this breeze.
Marshall: You think that's good? Stand over this heating vent. It's like your junk's on a tropical island.
Barney: Oh! Little Barney says mahalo.
Ted: Robin Scherbatsky, will you be my back-up wife?
Robin: A girl waits her whole life to hear those words. Yes, yes, a million times yes!
Marshall: Ted, Karen's a douche.
Ted: Wow, thanks for sugar-coating it.
Marshall: "Douche" is sugar-coating it.