Little Sisters (1972)

One of the girls wears glasses and has light brown hair — she’s the one who starts off posing near what looks like a pool, fully dressed but giving the camera a few sexy glances. Later she’s outside on a blanket with a guy and another girl, all of them naked, the three-way going from oral to full-on outdoor sex. The guy takes her from behind while the other girl lies beside them, playing with herself. There’s a moment where the glasses girl gets a facial — you see the cum dripping down her face, mixed with dirt or sweat, not sure which. Another scene shows her on her knees indoors, sucking the guy off by candlelight, his hand gripping the back of her head. The other girl has long dark hair and a slim build — she spends most of her time either watching or getting eaten out on the grass. Camera work is steady, medium shots, nothing shaky — lets you see the facial expressions and body movements clearly.