Sunde, Sex und scharfe Katzen (1980)

A slim brunette with dark short hair is on her knees outdoors, sucking a guy’s dick while they’re spread out on a blanket in the grass. Natural daylight, wide shot — you see the whole setup, including the trees and open sky behind them. She’s not rushing it, deep throating with her head bobbing steady, one hand stroking the shaft. Later it cuts to what looks like an interior scene, darker lighting, same girl still going at it, close-up on her lips stretched around the cock. No penetration or other acts visible, just solid blowjob content, both outside and inside. The camera stays tight during the oral, focusing on her mouth and the guy’s reactions.