La rabatteuse (1978)

A couple and a man sit in an airport hall. Robert, Greg's best friend agrees to keep an eye on his oversexed blonde girlfriend, Jocelyne, because he is out of the country for business. She, in return persuades any woman who catches Robert's fancy to a carnal encounter. The wide range of females include a stewardess, a shop assistant, a countess, a mother and daughter they meet at a café, the female usher from the local adult cinema and just about any other woman they pass on the street.