La amante perfecta (1976)

Guy in his 30s with short dark hair and a slim build wears a dress shirt and tie through most of the video — seen first adjusting it in a club, then later with it unbuttoned during sex. He gets a blowjob from a brunette woman in an office with bookshelves behind them, her hand working his shaft while she bobs. They move to a wide indoor staircase in what looks like a big house — dim light, wood railings — and she rides him facing away, then they do doggy against the wall. Another scene shows a blonde in her 20s at a bar, talking close to a muscular guy before things turn physical. Camera stays tight during oral, focusing on mouth and cock, with medium shots during dialogue scenes in restaurants and offices that establish the casual, roleplay-ish vibe. No full nudity in non-sex scenes, but shirts come off during action. Lighting shifts from harsh office fluorescents to low bar and stairwell glows, matching the escalation.