Fast X is given a 12A age rating

cinema history - Why would a movie that appears pornographic via it's rating (X) receive an Academy Award? - Movies & TV Stack Exchange

What makes a movie X rated? - Quora

The X-Rated Girl & Others Lot (Film Ventures International, 1979), Lot #51399

This Film Is Not Yet Rated (Movie 2006): MPAA Gets an 'F

Mary! Mary!, Original One Sheet X Rated Movie Poster

x-rated cult films

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

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

The X-Rated Life – Approved for All Audiences #atozchallenge - The Madlab Post