The Sensual Houseboat (1978)

The scene opens with two guys going at it on a bed — one on his back, getting a blowjob from a lean dude with short dark hair. It’s quiet, intimate, just mouth and cock, close-up enough to see every bob of the head. Then the camera cuts to a brunette girl, fully nude, standing by the door. She’s slim, got thick dark hair just past her shoulders, and she’s just watching. Doesn’t say a word. Next thing, she’s on the bed with the other guy — light brown hair, muscular — and they’re making out. She’s on top, grinding against him, then they switch, he’s on her, hands on her tits. Another girl joins — longer dark hair, curvier. They start touching each other while he jerks off watching. Then he’s back in it, fucking the first girl from behind while the second goes down on her. A lot of oral, both girl-on-girl and blowjob. Most of it’s soft-lit, looks like natural light from a window. The houseboat setting shows in the wood paneling and porthole in the wall. Camera stays close, lots of focus on faces and hands.