Sexual dysfunction refers to a problem during any phase of the sexual response cycle that prevents the individual or couple from experiencing satisfaction from the sexual activity. The sexual response cycle includes excitement, plateau, orgasm and resolution.While research suggests that sexual dysfunction is common (43 percent of women and 31 percent of men report some degree of difficulty), it is a topic that many people are hesitant to discuss. Fortunately, most cases of sexual dysfunction are treatable, so it is important to share your concerns with your partner and health care provider.