Ecco lingua d’argento (1976) (Better Quality)

One of the girls has short blonde hair and a tight, athletic build — she’s on her back early, legs spread while the other, a brunette with straight bangs, goes down on her. The chemistry feels natural, not forced like some studio girl-on-girl stuff. They switch positions halfway, with the brunette on top grinding face-first into the blonde’s pussy, both moaning loud. The camera stays close during the oral, you see every flick and suck, which is exactly what you want from a scene like this. Lighting is soft but bright enough to see the sweat on their skin by the end. No guys, no gimmicks — just two slim white girls taking their time eating each other out.