The Bride Wore Black.

When his beautiful wife is tragically killed in a road accident, her French husband goes to Venice to try and discover why her body was not recovered from the blazing wreck. After picking up on a clue, he follows his wife's solicitor to a country mansion, where he discovers his wife and a group of other fetishists playing hardcore games. She tells him that she had to escape from him because he was boring in bed. She wants to teach him new pleasures and so introduces him into the sex life of her perverted friends. He indulges in their desires and discovers amazing new things that he never knew. But there is a bitter twist at the end of this excellent Frank Thring movie!