Appassionata (also known as Passionate) is a 1974 Italian erotic drama film directed by and co-written by Gianluigi Calderone.
The film stars Gabriele Ferzetti as a dentist whose stable life is put into jeopardy when his daughter and her friend, played by Ornella Muti and Eleonora Giorgi, begin sexually pursuing him.
Emilio is a dentist whose mentally unbalanced wife never goes out, spending much of the day at her piano.
Their daughter Eugenia brings home a school friend, Nicola, who is sympathetic towards the mother but also tries quick sex with the father.
When the mother eventually has to be placed in a clinic, it is Nicola who puts the grieving Emilio to bed.