Seventeen Special 02: Anal Teeners (1989)

Starts with a blonde teen with big tits playing with herself on the bed, then she gets eaten out by another blonde with a similar body. The second girl goes down on her for a while, then a guy shows up and takes turns fucking both. The camera gets close on the oral parts, and the threesome part is all over the bed with good angles on the penetration. One girl’s got a tight, curvy frame, the other’s a bit softer but both are young and eager. No frills, just solid action in a cozy bedroom setting.