Erika's Hot Summer(1971)

Sleazeball photographer Steve is busy taking pictures of beautiful young women, bedding them, and then dumping them. One day he meets the woman of his dreams on the beach: Erika. Once he's frolicked on the beach and taken her to bed, the other women in his life become unsatisfactory, and he suffers a playboy's crisis. One of his other women proves to be a bit more persistent than he expects.