Three in the Attic

Three in the Attic is a 1968 movie, starring Christopher Jones and Yvette Mimieux, with Judy Pace and Maggie Thrett. Nan Martin, John Beck, and Eve McVeagh appear in supporting roles.

Paxton Quigley Christopher Jones, a renowned womanizer, is a student at the fictional Willard College for Men, located one mile away from the fictional Fulton College for women. The schools are located in small college communities in the middle of Vermont.After meeting at a Zeta Chi ZX fraternity party, Paxton and a Fulton undergrad, Tobey Clinton Yvette Mimieux, begin dating. They then take their relationship to the next level by spending the summer together by the beach in Provincetown. ........

Source: Wikipedia