*sigh* Everything old is nude again. From Sam Adams’ Slate review of Ira Sach’s Passages: Movie theaters are full, Eurodance is big: Close your eyes and it’s the 1990s again. Adding to the throwback vibe, there’s a new controversy about sex in movies. The story of a love triangle between a German film director (played by Franz Rogowski), his husband (Ben Whishaw), and an elementary school teacher (Adèle Exarchopoulos), Ira Sachs’ Passages premiered to strong reviews at Sundance but was given an NC-17 rating by the Motion Picture Association for its explicit sex scenes. The film’s distributor, Mubi, has opted to release it in theaters unrated, but not before a round of interviews in which Sachs called the MPA’s decision “a form of cultural censorship” and pointed to the ratings board’s long history of disproportionately stigmatizing sex, especially when it’s between same-sex partners. Created in 1990 to replace the disreputable X, the NC-17 rating, which bars admission to anyone under the age of 17, has fallen almost completely out of use in recent years. Last fall, the Marilyn Monroe biopic Blonde became the first major NC-17 release in almost a decade, and it appeared in only a handful of theaters before making its way to Netflix. In an environment where smaller, non-studio films often find their biggest audiences on streaming, ratings have come to feel increasingly less important, verging on irrelevant. The NC-17 label has also become less important because it’s so rarely called for. Twenty-first-century cinema, particularly in the…