The New York Ripper (1982)

Redheaded girl with curly hair and a slim body lights a candle in a dark bedroom, setting a moody vibe. She’s wearing nothing and clearly getting ready to get it. Soon after, she’s on the bed with a guy, sucking his dick with slow, deep strokes — you can tell he’s into it by how he’s gripping the sheets. They switch to doggy style, her ass bouncing as he pounds her from behind, camera tight on the movement. Later, a blonde in stockings shows up, lying on the bed talking, but we don’t see her do anything sexual. The lighting stays dim throughout, mostly greens and shadows, gives it a gritty, low-key porn feel without fancy production.