"Shama" is an adult drama about a sex addict and his sister, who both had to go through a lot in their lives.
There are two things you need to know before watching this movie: The first one that there is quite a lot of sex, and that this is not a mainstream hollywood movie. It is a calm movie, sometimes there are long sequences without any talk. Also, there is one thing this movie has what is missing in other movie: art. The movie's score is mostly piano-based, letting the visuals talk. Sex scenes, while graphic, don't seem pornographical. Michael Fassbender gives a superb performance, and should be nominated for an Oscar as "Best Actor in a Leading Role". This is a movie for people who love movies from the Sundance or Cannes Film Festivals. It is artful, beautifully filmed and perfectly acted. The ending is shocking and thought-provoking.
(SPOILERS may follow:)
Really, one thing you need to know before letting your kids watch this movie, is that it is rated NC-17 for sex. The movie starts with a scene of male nudity and also has several scenes filled with naked people of both sexes. In one scene we see a man and a woman having anal sex. The content is strong, but nothing you wouldn't have seen in an R-Rated movie. The scene that mostly caused the NC-17 is one scene in which a man and two women have a threeway. There is no penetration, but everything else. The scene is extremely graphic, and is at the NC-17 level. However, the music that is played, which is a calm piano melody, makes it seem much less erotic. This movie is not meant to arouse. It's nothing for children, however.
If you think that sex isn't a big deal then there is only one scene to worry about: There is one scene showing the aftermath of a suicide, we see a woman having her wrists cut (blood is present), this scene is very sad and emotional. A man is beaten up, but it is not too graphic. There is frequent strong language.
(END OF SPOILERS)
I don't think that sex is a big deal, but I know several people have got a different opinion. Older teenagers will have no problems watching this movie. But maybe their parents will.