Saturday Night Special (1976)

The blonde is short-haired and petite, wearing a bikini outdoors at one point. The brunette has long straight hair and is equally slim. They start off together on a couch, kissing softly under warm indoor lighting. Later, the guy joins in, first interacting with the brunette while she’s seated on a chair, her legs spread wide. There’s an outdoor group scene near a car, where both girls get involved with the guy simultaneously. The camera gets up close during the intimate moments, especially during the indoor shots. The whole thing feels casual but intense, with a mix of soft lighting indoors and natural daylight outside.