Island of Death (1976)

So there’s this hot blonde and a brunette with long hair running around on the beach, looking all playful. Then things get serious when the guy—big, muscular, bald—bends the blonde over some furniture and starts pounding her from behind. The doggy style here is rough, no slow buildup, just straight-up fucking with good angles on her tits bouncing. The brunette’s in the background, still in lingerie, watching or waiting her turn, which adds to the vibe. Lighting’s dim but warm, so you get that moody, late-night feel. If you like beach scenes that actually deliver on the sex, this one’s got the goods.