Deep Throat, a pornographic film directed by Gerard Damiano, a film-loving hairdresser, and starring Linda Lovelace, a shy girl manipulated by a controlling husband, was released in 1972 and divided audiences, who began to talk openly about sex, desire and female pleasure; but also about violence and abuse; and about pornography, until then an almost clandestine industry, as a revolutionary cultural phenomenon.

One of the first documentaries produced about the then budding New York porn industry, Changes is a studious and at times humorous exploration of everything from live sex shows to gay liberation.