Petersen (1974)

Starts with this blonde in a thin white nightgown standing by a window—light coming through, you can see the outline of her tits and ass. She’s not doing anything explicit, just looking out like she’s waiting for someone. Then cuts to a curvy brunette MILF in a light blue blouse, mid-30s, full lips, looking straight at the camera with this shocked face like she just heard something wild. No sex, but her expression sells it. Later, some older suit guy with messy gray hair in a party scene, looking surprised too, but the blonde in the nightgown is the real tease here. Good lighting, solid close-ups, but don’t expect hardcore—just buildup.