Midnight Cowboy - Wikipedia

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Rated X (TV Movie 2000) - IMDb

Adult rating, Rating System Wiki

A History of the X and NC-17 Ratings – The Hollywood Reporter

Hollywood's Battle Against the X Rating, 30 Years Later - The Ringer

Every Major Movie That Got Slapped With An X Rating

Iza Calzado's Movie Bliss Gets X Rating + Where to Watch It - When In Manila

X (BBFC), Rating System Wiki

Film Ratings Explained: What Are The Arbitrary Differences Between Film Ratings And Why They Exist - Hollywood Insider

MPA Film Rating System, Logopedia