I give this one an on, but this one should only be seen by mature adults. Sex and gore abound, but thankfully the movie keeps the body count from becoming ridiculous. It's not just another horror. It's one of the most visually intoxicating movies I've ever seen and has intelligent elements that elevate it above the average horror movie.
Do not watch this if you are under 21. I accidentally watched this when I was 9 (on the case I saw it from it told no rating) and I had nightmares for a few months. Do not think I think it is bad, it is just really bad for kids under 21. I was the unlucky one to watch it. I am repenting right now.