Strangers (1972)

One of the girls wears a tight blueish shirt with ‘DEEP SEX’ in bold letters — doesn’t look like merch from any brand, just something made for the scene. They start in a dim indoor bathroom, both fully clothed at first, but quickly move to grinding against each other with hands down pants. The camera gets low angles during cunnilingus, staying tight on the wetness and how one pulls the other’s hips down hard into her face. Outside scene is in daylight, more natural — they’re on a short wall or curb, one girl riding face-first while the other grips her thighs wide open. No penetration with toys or fingers, just mouths, grinding, and full-body contact. The darker-haired one is slimmer, almost boyish, while her partner has a thicker waist and bigger tits that swing during oral.