Human sexual activity is a complex process. For example, men and women living together for a long period of time gradually develop the so-called aesthetic fatigue, incompatible relationship with their spouses, and conflicts, which often affect the libido and erectile function of the penis. For men who have just started their sexual life, sometimes the lack of sexual knowledge, or excessive mystery about sex, or excessive introverts and so on, resulting in penile erection is not hard or can not be erected. Other reasons for the formation of bad sexual psychology include: bad sexual experience, irregular life, fatigue, work or financial pressure, incorrect understanding of the media publicity, anxiety and depression caused by the fear of diseases and side effects of prescription drugs, and so on. At the same time, anxiety and incorrect understanding of impotence can, in turn, cause psychological problems, the latter of which add to impotence. Of course, psychological problems are only one of the important reasons for getting. Never simply divide the causes of impotence into psychological and organic, because most of the causes of impotence is not a single, both psychological factors and organic causes exist. Various diseases that affect the function of blood vessels and nerves can cause impotence.