For whatever it's worth, I'm planning to watch Pitch Perfect with my ten year old Friday afternoon when winter break starts. The sexual stuff is much milder than the sex stuff in Buffy--it's all off-screen, sometimes alluded to but never shown. It's all pretty sex-pos.

There's some casual (presumably underage) drinking, one scene of fairly comic violence (it does include a man being kicked in the balls--but in fairness, he tells someone to kick him in the balls, trying to start a fight), and a couple short bursts of embarrassment humor...but it's done in a way that, to me, didn't feel gross. I didn't feel, much, like we were laughing at them, if that helps at all. There's also some vomit humor, but it was over the top enough that I wasn't terribly grossed out.

All that said, if you're doing OK with Buffy, I think Pitch Perfect would be just fine.