Hardgore (1974)

Camera opens on a dimly lit living room where four people are already going at it on and around a couch. A thick brunette with long dark hair is on her hands and knees, getting hammered in doggy style by a muscular dude with short dark hair — his ass is flexing hard with each deep thrust. Across the couch, another woman, also brunette and curvy, is sucking the second guy off while stroking his shaft with her hand. They switch it up — the guy she was with gets pulled into a missionary fuck while she moves down to deepthroat the other dude. Later scene shifts to a bedroom where the two women are topless, sitting close, one of them clearly mid-blowjob with spit trailing from her lips. Final shot shows both women together on a couch in daylight, one fully topless with big tits out, just sitting like it’s casual — cool contrast to the chaos earlier. Lighting’s mostly dim, lots of natural movement, feels unscripted.