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What makes a movie X rated? - Quora

Best X-Rated Movies: Adult Movies That Are Actually Good - Thrillist

TIL the 1983 film Scarface was originally given an X rating three times in a row by the MPAA. On the fourth appeal, the film was finally given an R rating, but

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The movie ratings G, PG, PG-13, and R are obvious in why they are different. But what are the difference between NC-17, X, and Unrated? - Quora

FSM Board: Films That Received an X Rating in the U.S.

Judge Upholds X Rating For Almodovar Film - The New York Times

3. The Contemporary Movie Rating System in America” in “Sexuality in the movies” on Digital Publishing at Indiana University Press

Why is 'Blonde' – Netflix's Marilyn Monroe biopic – rated NC-17 instead of TV-MA?

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