#6: ZACK AND MIRI MAKE A PORNO (2008)

Sexual Arrangement: Lifelong best friends agree to have meaningless sex on camera for their self-made porno film.

Even though Seth Rogen’s intentions are far more platonic in writer-director Kevin Smith’s flick, his character’s scheme is ingenious. If we had a platonic female friend as hot as Elizabeth Banks, we’d try to navigate out of the friend zone on a daily basis. So what better way to not sound creepy while requesting sex than to pitch a low-rent, bill-paying porno movie? The feelings built through years of close friendship would surface, of course, much like in the movie, but that’s all right. They say “friends make the best lovers,” right? Especially pals that look like Ms. Banks.