Come, quando, perché (1969)
Come, quando, perché (internationally released as How, When and with Whom) is a 1969 Italian romance film written and directed by Antonio Pietrangeli. It is the last film of Pietrangeli, who died drowning in the sea of Gaeta, while he was testing once again some shots for the next day; he was eventually replaced by Valerio Zurlini.
More at Wikipedia.