Worksex (1979)

The dark-haired girl has a thick, curvy build and full tits — she’s the one who starts things off on the car hood, squatting over his face while sucking him off in a 69. He pulls her up after, gets her on her knees in the backseat for a quick blowjob. Inside, the bathroom scene shows her riding him in the tub, back flat against the tiles, slow and grinding, her hair soaked from the damp air. The blonde’s more petite, pale, with big nipples — she takes over in the bedroom, sucking him deep with her mouth wide, throat flexing. Multiple angles of them going at it missionary, then a tight close-up of her riding him, sweat on her lower back, thighs clenching. Camera work is steady, no shaky phone bullshit, all medium and close-ups that actually show the action.