Waves of Lust (1975)
Original title: Una ondata di piacere
Waves of Lust is a 1975 Italian-language thriller movie directed by Ruggero Deodato, with a running time of 1h 28m. It stars Al Cliver, Silvia Dionisio and John Steiner.
A young couple become embroiled with the personal problems of another couple on a yacht moored off Sicily during a turbulent weekend of fun, games, sex games, betrayal, spouse abuse, and murder.