Read the book. Skip the movie (which I hate more and more with every day that passes) and read the graphic novel. I just finished it. So good - touching, tragic, profound, and with just enough sexuality to make its point. I don't care about the movie's Palme D'or, it's a terrible adaptation that misses the entire point of the novel.
And I swear that's the last time I'm going to pester you with that movie/book. Just make sure to add it to your list okay?