According to Zombie's Facebook, the MPAA slapped his film with an NC-17 rating after he edited it twice

He wrote this on his Facebook page:

“Well, after two tries through the MPAA our rating on 31 remains NC-17. Maybe three is the charm to get an R rating. Why R you ask? Well, because your local theater will not show an NC-17. Even though you are a fucking adult … things much be censored for your enjoyment.”

It was rated NC-17 for some normal things like “sadistic graphic violence” and “some strong language,” but also for some weirder things like “bizarre sexuality.”

‘31′ promises to be sadistic and sick–I guarantee that even though Zombie is expressing indignation about it, he’s perfectly fine with the attention and the type of horror movie fans that will be out to see it.