Sinner: The Secret Diary of a Nymphomaniac (1973)

Linda Loves her work, and her work is LOVE...

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...