Sapore di donna (1990) - Mario Gariazzo

IMDB:Perry moves to Miami to study in medical school, where his uncle is a teacher. He decides to rent a room from a friend of his mother, who owns the house. There he begins to dream about a beautiful Sheila, daughter of the owner of the house. They soon becomes very good friends, but Perry did not know that Sheila secretly serves as a model in adult magazines.

Play Motel (1979) - Mario Gariazzo

This is definetely one of the sleaziest giallo that ever got produced. The Story ia about a sex club where customers get photographed and black mailed afterwards. When a killer is lose on the club the police starts to investigate in the murder. It stars Ray Lovelock and Anna Maria Rizzoli and was directed by Mario Gariazzo.

Schiave bianche: violenza in Amazzonia aka White Slave (1985) - Mario Gariazzo

From IMDB:
A young woman seeks vengeance and finds love when her parents are killed in the Amazon and she is taken prisoner by an indigenous tribe of headhunters.