Private Parts

Private Parts is a 1972 American horror film directed by Paul Bartel in his feature film debut, and starring Ayn Ruymen, Lucille Benson, and John Ventantonio. Its plot follows a troubled young woman who suspects a deviant serial killer is living in her aunt's dilapidated hotel in downtown Los Angeles. The film has been noted for its stylistic mixture of horror, dark comedy, and psychological thriller elements.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.