Looking for vintage porn of teen with pigtails and licking lollipop

Many years ago I saw a vintage porn video on a betamax tape of a naked girl sitting with her legs spread with sneakers on ( or possibly school shoes with white socks ) and licking a lollipop with a man ( possibly a doctor ) examining her pussy. The man rubs the lollipop on her pussy and gives it to the girl who lustfully licks it and he rubs it on her again and he licks it making a "mmmmm tastes good!" expression. The scene goes to side view of the girl going down on her knees and level with the guys cock. She looks at the cock before her then looks up to the guy and back at the cock then suddenly starts licking the cock head lustfully and taking just the tip in her mouth while moving her head around sucking on the head like a lollipop. The next scene is her on all fours ( possibly on a hospital bed ) with the man fucking her from behind. That is all I can remember from that, possibly from the 1960s or 1970s.