Most masturbation is safe and healthy, sex therapists say. And it can improve sexual function and relationships by teaching both men and women about their own sexual responses, so they’re better able to explain to their partner what feels good to them. However, if a person is compulsive with masturbation to the point of interfering with personal relationships, he or she may want to seek help for obsessive behavior. However, people who become too obsessed with solo sex can develop sexual problems or lose interest in sex with their partners. Finally, masturbation can, in fact, cause injury; frequent or overly vigorous masturbation can irritate the skin of the penis, and men who masturbate face-down can injure their urethras.