Last Sex Act (1978)

The scene opens with a blonde in a red-lit bedroom on her knees, deepthroating a dude with a thick bush while he fucks her face hard. She pulls off with a wet pop, spits on his shaft, then he flips her to doggy and starts pounding her from behind — you see the stretch, the slap of skin, her tits bouncing. The brunette from the filename isn’t in every shot, but shows up later straddling him on the bed, riding slow then picking up pace, grinding in a pink glow. Camera stays tight during the blowjobs, focusing on lips stretched and saliva dripping. There’s a random solo shot of a curly-haired guy jerking off on a bed, then another with a guy at a desk like it’s a flashback or fantasy. The sex scenes are well-lit enough to see sweat and facial expressions — especially the blonde’s grimace when he cums on her face.