Sexual Perversity in Chicago is a play written by David Mamet that examines the sex lives of two men and two women in the 1970s. The play is filled with profanity and regional jargon that reflects the working-class language of Chicago. The characters' relationships come to be hindered by the caustic nature of their words, as much of the dialogue includes insults and arguments. The play presents "intimate relationships [as] minefields of buried fears and misunderstandings". The play has been adapted for film twice: as the 1986 film About Last Night and the 2014 film About Last Night.