The verdict is out for the movie adaptation of EL James' erotic saga Fifty Shades of Grey as the British Board of Film Classification (BBFC) gave the film an 18 certificate for "strong sex."

The uncut version of the film, which is being marketed as a Valentine's Day date movie, is set to be released in UK theatres on February 13.

According to the BBFC publication released February 3, "The film contains strong sex and nudity, along with the portrayal of erotic role play based on domination, submission and sado-masochistic practices. There are also strong verbal references to such practices and the instruments used."

The movie is based on a trio of adult novels about a young and innocent graduate student Anastasia Steele who falls in love with a handsome and powerful business tycoon by the name of Christian Grey. As the relationship of the two characters shifts from professional to romantic, Anastasia is introduced to the world of bondage, dominance, sadism, and masochism (BDSM) as she is swept into a whirlwind of complications surrounding her enigamatic beau.

Meanwhile, the film was granted more leniency in the United States as it was recently given an R rating by Motion Picture Association of America for "strong sexual content including dialogue, some unusual behaviour and graphic nudity."

The rating would allow teenagers below the age of 17 to see the movie only if accompanied by an adult.

Meanwhile, producers of the film are not discounting the fact that they could be releasing a more explicit version of the film, even if it means that it could receive an NC-17 rating.

An NC-17 rating would mean that teenagers below 17 years would not be allowed to see the film in theatres.

"Everybody could go and enjoy the R version and then if they really wanted to see it again and get a little bit more gritty with it then have that NC-17 version out there as well," Producer Dana Bruneti said in an interview with The Independent.