Il fiore dai petali dacciaio (1973)

Starts with this hot blonde—long straight hair, slim but with a nice curve to her hips—lying on a bed in just her panties, touching herself like she’s waiting for something. Then a guy in a suit shows up, looking all business but clearly here for one thing. She’s in black lingerie, crawling over him while he sits on the edge of the bed, kissing and grinding before she finally straddles him. The lighting’s dim with a greenish tint, like some moody Instagram filter, which actually works for the vibe. She rides him slow at first, then picks up speed, and you can see her tits bouncing in that lingerie. The camera gets right in there for close-ups of her face and his hands gripping her waist. No crazy positions, just solid fucking with good angles on the action.