Pain Mania (1983)

A blonde in her 20s with slim build and small tits is on her knees going down on a curvy brunette with long dark hair. The strapon wearer — another young brunette with short hair — mounts the blonde from behind, pushing deep in doggy style while gripping her hips hard. Camera stays tight on faces and strapon movement, showing the blonde gagging slightly as the strapon bottoms out. The scene shifts to missionary with the curvy girl taking the strapon, legs spread wide, getting plowed while fingering her clit. Lighting’s low, almost dim red, adds to the raw, private feel. No talking, just moans and the sound of skin on skin — feels like voyeur footage shot in someone’s bedroom.