She’s 19 and Ready (1979)

The girl’s small tits bounce fast as she rides the guy hard, grinding in a low squat that shows off every inch of cock. She’s blonde, slim, early 20s maybe, but the title says 19 so I’ll take it. They switch to doggy against the edge of a bed, her ass slapping loud each time she pulls back, then takes it deep. Camera gets tight on the blowjob too — she’s not faking it, gagging slightly as he thrusts into her mouth. Outdoors shots show them on a boat deck, but most of the action’s inside, dimly lit, focused on her face during cumshot. Dude finishes on her chest, rubs it in while she smiles, relaxed and turned on.