Blue Heat (1978)

This one kicks off with a skinny blonde teen getting undressed by two guys — one stocky with a red cap, the other younger and average build. She’s kneeling in front of them, looking up while one holds his belt open, ready for action. The POV shots here are tight, focusing on her face and the belt area. The fucking starts with her on her back, legs raised, and the younger guy going at it. The dim lighting sets a mood, and the camera really zeroes in on the action. There’s no fancy setup — just raw fucking with a focus on the performers’ bodies and expressions.