American Pie (1980)

The scene starts with a tall blonde in a tight top and jeans standing in a kitchen with a shorter brunette who’s got a slim build and dark hair. They’re close, flirting, touching arms — you can tell this is going somewhere. Cut to them on a bed, both in bras and panties, making out hard, tongues deep, hands roaming over each other’s backs and asses. The blonde goes topless first, showing off medium-sized natural tits as the brunette grinds against her. They spend a lot of time in close-up kissing, switching positions from lying down to half-sitting, really immersed in the moment. There’s no anal or penetration shown in these frames, just heavy grinding, skin-on-skin contact, and the kind of slow buildup that feels personal, not staged.