why can't I get shortbus at Blockbuster?

Shortbus is the only one of the films I've seen, and it may be paranoid for me to say this, but--having imdb'd the other two it seems like they're straight, or at least based around as straight storyline, whereas Shortbus is (to coin a phrase) queer as fuck. Wasn't there some kind of scandal with Shortbus and erect penises or something? Blockbuster does seem to trade on the so-called 'family' thing...