Linda's frustration with her inability to achieve orgasm causes a friend to recommend that she see a sex therapist about her problem. During the exam the therapist discovers that Linda's clitoris is located in her throat and recommends deep throating as a treatment to her ailment. Linda then goes on to experiment with this new technique as she searches for a husband.
Documentaries were the first types of films to break through the hardcore feature barrier in 1969. SEX U.S.A. highlights the frank, open, and revolutionary sexual attitudes of the time.
