Keep It Up Downstairs (1976)

Blonde girl in a ponytail sits close to a brunette guy on a couch, both looking relaxed but focused on each other. They start touching — nothing wild at first, just hands on thighs, then slow neck kisses. The camera stays tight, catching every little moan and lip bite. Her hand drops to his crotch, starts rubbing through his pants while he fingers her through her jeans. A second girl shows up later — another slim blonde, similar age — and joins in, kissing the first girl while the guy jerks off watching. The lighting stays dim throughout, mostly red tones from the background, gives it a private, raw feel. No loud music, just natural sounds, breathing, clothes shifting. They take turns making out, swapping positions, never rushed. The whole thing looks like something that just happened, not staged.