Robin: Look at you two. Smokers. Just like the rest of us.
Barney: Whoa, whoa, whoa, whoa, whoa, whoa, whoa. I am not a smoker. I only smoke in certain situations: Post-coital, when I'm with Germans. Sometimes those two overlap. Coital, birthdays, to annoy my mom, pre-coital, on a sailboat, the day the Mets are mathematically eliminated every year, and, of course, wait for it, 'cause Lord knows I have, pregnancy scares.
Ted: Why are you smoking right now?
Barney: I'm always pre-coital, Ted.