Peaches And Cream (1981)

Sunny, a down-on-the-farm girl who decides, after a confrontation with her stepfather, to head out to the big city. There she finds that she has to sell her body if she wants to make the really big money, so she jumps right into action and becomes the classiest hooker in the San Francisco. One night while driving, she sees a hustler being accosted by her pimp. Sunny saves the girl, leads her to someone who can do some good and with a little coaching by Sunny, the new girl becomes another high-class prostitute.