The Satanist (1968)

One of the girls has long dark wavy hair, the other’s a blonde with straight locks down her back. They’re both slim, early 20s, and start out touching each other intimately on the bed, fingers sliding slow under clothes. The guy, short dark hair, slim build, joins in and the three of them shift into heavy making-out — long tongue kisses, hands everywhere. You see the dark-haired girl straddling him briefly before they switch to missionary, both girls taking turns riding or getting eaten out. The lighting’s low, camera stays tight — lots of close-ups on mouths, fingers in hair, skin contact. There’s a brief outdoor shot of the dark-haired girl walking into a house, another of the guy sprinting naked down a road, but the meat of it is the bedroom action with constant swapping and wet oral.