Bordellet (1972)

The scene starts with a group of people hanging out in what looks like a living room, three guys and a few women, all dressed casually. The blonde in the updo separates from the group with one of the guys, moving to a couch where the lights are lower and things get physical fast. They’re both fully clothed at first, but she unbuttons his pants and starts jerking him off while he slides her top down, getting her small tits out. They kiss deeply, her hand working his cock under the fabric, then they shift so he’s behind her — doggy style against the back of the couch, her skirt bunched at her waist. You can still see the others in the background, not paying attention, which adds a risky vibe. Camera stays tight on their movement, focusing on her face and his hand gripping her hip as he pushes in and out.