Sex in movies is about human sexuality in movies. Any form of sexuality being present in movies has been controversial since the development of movies. Some movies having sexuality have been criticized by religious groups. Some have been banned or censored by the governments of certain countries. In countries with film rating systems, movies having explicit sex often get a restricted rating. For example, in the United States, many movies with explicit sex are given NC-17 ratings by the Motion Picture Association of America. Examples of such movies are "Blue Is the Warmest Colour" (2013), "Showgirls" (1995), "Belle de Jour" (1967), "In the Realm of the Senses" (1976), "Last Tango in Paris" (1972), "Crash" and "When Night Is Falling" (1995). 