Com as Calças na Mão (1975)

The scene starts with a guy in his 30s, brown hair, slim build, standing on a boat with a blonde in a bikini top. She’s young, maybe early 20s, slim with short blonde hair and small tits. They’re talking at first, but it quickly turns into heavy petting near the bow, water in the background, sun hitting them side-on. He drops to his knees and gives her a Blowjob while she leans against the railing, one hand on his head, the other gripping the boat edge. She takes over and rides him facing out, bouncing slow at first then picking up pace in doggy style. The camera gets tight on her ass cheeks clenching with each thrust, then cuts to close-ups of her mouth as she jerks him off and swallows. Camera work is natural, mostly wide outdoor shots with a few dim indoor scenes later that look like an office or living room, but the boat sex is the main event.