Sinner: The Secret Diary of a Nymphomaniac(1973)

Original title: Le Journal intime d'une nymphomane

Linda comes to the big city in search of fun and excitement. What she finds is exploitation and abuse at the hands of a succession of sleazy guys. Searching for love, she enters into a lesbian relationship with a beautiful countess, discovers drugs and swingers' parties and starts acting in porno movies. She also begins to write a secret diary...