There is no exact statement on how many times a week is normal for a man to have sex, usually as long as he does not feel tired and does not affect the next day’s daily activities can be, usually maintained at 2-4 times a week are in the normal category. Sex is not only a way for human beings to reproduce, but also a way to release stress and promote the relationship between husband and wife. As for the frequency of sex should also be based on their own situation to judge, if the daily work is busy and more tired, it should be appropriate to reduce the frequency of sex, and for couples preparing to give birth to children, it should be appropriate to increase the frequency of sex, especially before and after the female ovulation. In daily life, it is recommended that boys do appropriate outdoor sports, such as running, swimming, basketball, etc., not only can enhance physical fitness, but also can appropriately improve sexual performance, during sex to do a good job of cleaning, to avoid infection disease. When the body appears uncomfortable symptoms, should go to the hospital in time, active treatment, so as not to miss the condition.