Eager Beaver (1977)

This chick’s got long dark brown hair, slim but toned, and a sleeve of tats on her arm — looks like she’s really into it. Starts off touching herself in dim blue lighting, then switches to sucking some dude’s cock with zero hesitation. The camera gets right in there for close-ups, so you see every sloppy detail. Later, she’s back to playing with a vibrator against a textured wall, grinding like she’s trying to break it. There’s also a quick outdoor shot with her and some guy on a beach, but the real action’s all indoor — tight angles, low light, and her getting off hard.