The Lickerish Quartet (1970), Basic Instinct (1992), or The Night Porter (1974) — but rawer and less polished.
Here’s a short write-up for The Dark Side of Love (1984), suitable for a site like Ok.ru (often used for rare, cult, or obscure films). The Dark Side of Love (1984) – Italian Erotic Thriller The Dark Side Of Love -1984- Ok.ru
As secrets unravel and bodies start to pile up, no one is innocent—and love’s dark side proves to be fatal. The Lickerish Quartet (1970), Basic Instinct (1992), or
(Uncredited or pseudonym – typical for low-budget ‘80s Italian films) The Lickerish Quartet (1970)