Loves of a Blonde (1965)
Golden Globe Award for Best Foreign Language FilmAward details: (details at IMDb)
A working-class young woman (Andula) in a hick Czech town sleeps with one of the band members of a group from Prague. "You are a Mondrian, not a Picasso," he tells her. When she doesn't hear from him again, she packs up and arrives on his doorstep in the big city, throwing his household (he lives with his parents) into chaos.