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There are only passing references made to sex and all nudity is completely obscured and is fairly important to the story rather than being gratuitous.
I love this movie and I think it is a wonderful modern take on a French classic. The language, however, is less than noble. Parents should know that there are some words used in this film that are 'big' curse words [at least in my world] and they are hard to gloss over when watching the film with younger children as a PG rating would indicate that you are able to do. I watched it with my 10 year old and her eyes got a little big from time to time and she gave me that 'oh-oh' face. I didn't remember them being there from my original viewing a decade or more ago.