Ann Noland,Susanne Benton,Renee Paul in Best Friends (1975)

Handsome (and frequently shirtless) young Jesse (Richard Hatch) arrives at an army discharge center with his fiancé Kathy (Susanne Benton) and her rather flaky friend Jo Ella (Ann Noland) to pick up his best buddy, Pat (Doug Chapin). Pat and Jesse have been friends since childhood as we see in the opening montage of B/W photos. Now they are both out of the army, an experience which (very subtly implied) seems to have affected Pat a bit more than Jesse. The two and their girls are going to drive across the desert with an RV and then Jesse and Kathy are going to get married and settle down. But Pat has some different ideas in mind....