Fritz The Cat (1972)
Ralph Bakshi’s legendary countercultural comedy, based on Robert Crumb’s character, was the first cartoon to get an X-certificate in the US. And little wonder. The story of an amorous cat raising hell on his 1960s college campus, it features all manner of ‘adult themes’ – including explicit sex scenes. Audiences lapped it up, with the film making over $90 million dollars worldwide, on a budget of less than one million. Move over Top Cat.