Sex and Zen refers to a Hong Kong erotic film series known for its explicit content and adult themes. The first film, "Sex and Zen," released in 1991, gained international attention for its explicit scenes and became one of the highest-grossing Hong Kong films of its time. Inspired by the classical Chinese erotic literature "The Carnal Prayer Mat," the movie explores themes of desire, passion, and sexuality within a historical and fantastical setting. While the film's explicit content sparked controversy, it also contributed to the evolution of Hong Kong cinema and its exploration of adult themes. "Sex and Zen" remains a notable entry in the erotic film genre, both for its impact on popular culture and its influence on subsequent works within the genre.