Bites en chaleur (1976)

The blonde has bangs and a slim frame, sitting on the couch with her legs spread while the brunette — long wavy hair, wearing rings — leans in to lick her pussy. They start with a slow, open-mouthed kiss in the living room, framed pictures on the wall, sunlight coming through the windows. You see the brunette eat the blonde out thoroughly, tongue working in circles, close-ups showing wetness and the blonde gripping the couch. Later, they switch to the bedroom, dim lighting now, the brunette on her back getting pounded with a strapon, both of them breathing hard. The camera stays tight during the oral and strapon scenes, no cuts — you see every thrust and lip movement. No dudes until the end, where a hairy-chested guy jerks off in the mirror then gets a blowjob from the brunette, his legs spread on the bed.