Der Werwolf und der Yeti (1975)

The guy wears a brown turban early on, mid-30s, average build, light brown stubble, standing in a mountainous area under natural daylight. He’s alone at first, but by frame 3 he’s in a forest near a wooden structure, younger guy now, early 20s, brown short hair, bare chested and muscular. That same guy is later shown close-up indoors, dim lighting, jerking off with a tight grip, face in clear view, looking down at his hand. Then it cuts to the main scene — both of them outside on rocky terrain, the younger guy fucking a brunette woman in doggy style, her ass bouncing with each thrust, her back arched. She’s got curly brown hair, average build, wearing no top, grinding back against him hard. The camera stays wide for most of it, letting you see the full bodies, the movement, the sweat. No faces are reused across the older and younger guy — seems like two different performers. The outdoor shots are bright, real sunlight, feels raw, not staged on a set.