Sexploitation, or "sex-exploitation," describes a class of independently produced, low-budget feature films generally associated with the 1960s, and serving largely as a vehicle for the exhibition of non-explicit sexual situations and gratuitous nudity. The genre is a subgenre of exploitation films. Sexploitation films were generally exhibited in urban grindhouse theatres, the precursor to the adult movie theaters of the '70s and '80s that featured hardcore content. The term soft-core is often used to designate non-explicit sexploitation films after the general legalization of hardcore content. Nudist films are often considered to be subgenres of the sex-exploitation genre as well. "Nudie" films and "Nudie-cuties" are associated genres.