Teenage Coeds (1975)

Skinny blonde in her early 20s with a nose piercing goes to town on a dude with a tattooed arm in a dim bedroom. They start with a long blowjob, her head moving fast, throat deep, camera holding the wide shot so you see everything. Then she flips to her back for creampie-style penetration, legs up, taking it deep. Cut to solo shots of the same blonde girl, now alone on the bed, jerking herself off with two fingers, close-up on her pussy, moaning quietly. She keeps going for a solid minute, spreading, touching her clit, eyes closed. Dude’s muscular but not huge, white, short hair, looks like a college guy, fits the amateur vibe.