Lingerie (1983)

The outdoor scenes are short but hot — a guy standing behind a blonde girl in the woods, his hands cupping her tits through her shirt. You don’t see much, but the way she leans back into him sets the tone. Inside, the action really starts. A brunette with long straight hair is on her knees, sucking him off with enthusiasm. The camera gets close, showing her technique and how she looks up periodically. Later, she’s on her back, legs spread wide in missionary while he pumps into her. The scene switches to POV as she jerks him off, her slim body glistening under warm bedroom lighting. Another blonde girl joins in, riding him energetically while her tits bounce. The whole vibe is natural, with no over-the-top moaning or fake enthusiasm.