Dial P For Pleasure (1978)

Guy in his 20s with a muscular build sits back on a bed wearing black boots, fully dressed except for his cock out. The woman, slim with dark hair and pale skin, is on her knees in front of him, sucking him slow while running her hands up his legs — you can see the texture of the boots clearly in the close-up. They’re not rushing. She laps at his shaft, takes him deep, then pulls off to tease with her lips, all under dim, moody lighting. At one point she’s tied with bondage straps, hands behind her back, still working him with her mouth while he grips her head. Later they shift to the couch, more intimate touching, her riding him briefly before going back to oral. The whole thing’s got a raw, personal vibe — like you’re watching something private, not staged.