Contains probably the only ever love making scene of animated (silk?) kerchiefs; complete with sounds of the passion involved.
Like the French film "Pierrot le fou (1965)", also "Karvat (1974)" is adapted from the crime novel "Obsession" by author Lionel White. In Pierrot le fou White is uncredited and in Karvat his first name is misspelled as "Lionell".
Was the second film to receive K-18 rating (no one under 18 admitted) in Finland. The first was "Sensuela (1973)".