Angela’s Foursome (1972)

One of the women, dark-haired and slim with medium tits, is on her back while the muscular guy pounds her in missionary. The other brunette, a bit curvier, is up next — she’s riding him cowboy before switching to doggy on the bed. Camera stays wide for most of it, catches all four swapping partners twice. The older guy, balding and thick around the gut, gets a blowjob from the first girl while the other two go at it beside them. Lighting’s dim but clear enough to see everything — sweat, skin slap, cumshot on the pillow. Scene ends with both girls taking loads on their faces after deep throat shots.