The Frankie Goes to Hollywood "Relax" rock-clip porno-film sequence features Penthouse pin-up centerfold Lindsay Freeman (billed as Alexandra Day), adult film star actresses Annette Haven (uncredited) and Cara Lott (billed as as Pamela Weston) and horror movie scream queen Brinke Stevens.
Brian De Palma originally planned for this to be the first Hollywood film to boast unsimulated sex scenes. The studio thought differently.
The distinctive futuristic octagon-shaped top-of-the-hills ultramodern house seen in the movie is known as the "Chemosphere" and is located just off Mulholland Drive in the San Fernando Valley region of the Hollywood Hills in Los Angeles, California. The building was once described by the Encyclopaedia Britannica as "the most modern home built in the world". The architecturally Modernist dwelling was designed by American architect John Lautner in 1960.
Bret Easton Ellis's novel American Psycho (adapted into American Psycho (2000)) references this film many times. It is one of Patrick Bateman's favorite movies, and he's rented it over thirty-seven times.