Adult animation or mature animation is any type of animation work that is mainly targeted towards adults and sometimes also teenagers, acting as a contrast to most animated films and TV series being aimed at children. Works in this genre may be considered adult for any number of reasons. They may be noted for using risqué themes, graphic violence, profane language, sexuality, or dark humor. Works in this genre may explore philosophical, political, or social issues. Some productions are noted for sophisticated and/or experimental storytelling and animation techniques.
Before the enforcement of the Hays Code, some cartoon shorts contained humor that was aimed at adult audience members rather than children. Following the introduction of the Motion Picture Association of America film rating system, independent animation producers attempted to establish an alternative to mainstream animation. Initially, few animation studios in the United States attempted to produce animation for adult audiences, but later examples of animation produced for adults would gain mainstream attention and success.
The earliest cartoon series were based upon popular comic strips, and were directed at family audiences. Most animation produced during the silent film era was not intended to be shown to any specific age group, but occasionally contained humor that was directed at adult audience members, including risqué jokes. The assumed audience of these early cartoons, particularly Looney Tunes, has alternated from their initial unspecific audience, to children, and back to general audiences as "classics". The earliest known instance of censorship in animation occurred when the censorship board of Pennsylvania requested that references to bootlegging be removed from Walt Disney's 1925 short Alice Solves a Puzzle. One of the earliest animated pornographic films was Eveready Harton in Buried Treasure, produced circa 1928. It has often been suggested that the film was produced for a private party in honor of Winsor McCay. Rumors suggest that the film was developed in Cuba years after it was completed, because no lab in New York City would process the film. When a print was screened in San Francisco in the late 1970s, the program notes attributed the animation to George Stallings, George Canata, Rudy Zamora, Sr. and Walter Lantz.