Les Hotesses du sexe (1976)

The airplane setting makes this one stand out. A blonde and a brunette, both slim and white, work over a tattooed, muscular guy. The blonde rides him in the cabin, bucking hard while straddling him on the floor. When they move to the bathroom, the brunette takes over, jerking him off and then sucking him while he’s leaning against the sink. The camera catches his reactions close-up, with bright lighting making the whole thing look crisp and intimate. There’s no shortage of energy here — both girls are fully into it, and the cramped cabin adds a unique twist.