This is an interesting talk from Mark Kermode on the use of 'the F word" in two recent British films. He argues that the British Board of Film Classification (BBFC) have been "classist" by giving "Made In Dagenham" a certificate 15, whereas The King's Speech was given a 12. Such decisions affect teenage audiences who can see the film. In the USA "The King's Speech" was given an R rating for the number of its Fs! That will also restrict the age-range of who can see it in cinemas.