My Bed is Crowded (1973)

One of the brunettes has a tight little body and gets her pussy eaten out in close-up — you can see her clit getting worked hard by a blonde with big tits. They switch off, going from scissoring to tit fucking, all in a messy bed with the curtains open to natural light. Another dark-haired girl rides a third girl’s face, grinding slow at first, then bouncing harder. The camera stays wide for most of it, capturing all four of them naked, hands everywhere, pulling hair and sucking tits. There’s a lot of switching — nobody stays in one spot long. It doesn’t look staged; they’re actually touching and feeling each other, not just posing for the lens.