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The earliest association between anime and adult animation occurred prior to the 1972 release of Fritz the Cat when American distributors attempted to cash in on the publicity garnered from the rating by rushing out dubbed versions of two other adult animations from Japan, both of which featured an X rating in their advertising material: Senya ichiya monogatari and Kureopatora, retitled One Thousand and One Arabian Nights and Cleopatra: Queen of Sex, respectively.

However, neither film was actually submitted to the MPAA, and it is not likely that either feature would have received an X rating.

One Thousand and One Nights was the first erotic animated feature film, and at 130 minutes, it remains one of the longest animated films.