Appassionata

An Italian kink fest that has a dentist involved with his daughter's friend. The dentist is married to a professional pianist who appears to have suffered a mental breakdown leaving a mostly empty shell. Their daughter is reckless and walks all over the mother and is always trying to seduce her father. The daughter's friend has a screwed up life as well and tries to find solace by banging older men.

Mental illness, incest, and all kinds of other things keeps this one from being boring. If you miss the seventies fashion its all here. Not a bad film overall and was definitely an inspiration for American Beauty. You will have to read subtitles as it's Italian.