I saw the beginning of Mysterious Skin in my media studies class a few years ago. I watched the rest of it out of curiosity shortly afterwards and that's fairly shocking, seems like nothing compared to what you lot have posted about though
I really loved that film. It was sad, depressing and disturbing but I wouldn't say that it was disgusting.
I read the book too and I have to say, the film was a lot better than the book which is extremely rare.