The Witch Who Came from the Sea (1976)
The Witch Who Came From the Sea is a 1976 American horror film directed by Matt Cimber and shot by cinematographer Dean Cundey. The film concerns a dysfunctional and disturbed woman called Molly (played by Millie Perkins) who, after suffering repeated sexual abuse as a child at the hands of her seafaring father, embarks on a spree of gruesome sexual encounters with men who she meets during her job as a waitress in a seaside bar. The film's tagline was "Molly really knows how to cut men down to size!"
More at Wikipedia.