Sinclair Intimacy Institute - Sexual Positions for Lovers

Dr. Derek Polonsky is a psychiatrist teaching at Harvard Medical School.

His private practice specializes in couples therapy.

Dr. Marion Dunn is director of the Center for Human Sexuality at Downstate Medical Center

in New York and is in private practice.

In my sex therapy practice, I've seen that one of the most important ingredients of a strong, lasting relationship is a full and exciting sex life.