People often think that “a drop of semen ten drops of blood” and abstain from sex, in fact, in no special circumstances, abstinence from sex is not necessary. We can talk about sex and health from our own physiological phenomenon “nocturnal penile erection”: the penis is generally in a weak state without sexual stimulation, and the local nutritious arterial blood is greatly reduced compared to the erect state. In order to maintain the function of penile blood vessels, cavernous sinuses and other tissues, and to maintain a good erection, healthy men will have nocturnal penile erection, which is a state of erection without sexual stimulation, and most nocturnal penile erections are accompanied by periods of rapid eye movement sleep. Men with good sexual performance can have more than three nocturnal erections of 20 to 40 min each per night. This is one of the clinical means to identify whether there is serious organic erectile dysfunction. The mechanism of nocturnal erection is not yet clear, but it is generally believed that the central nervous system transmits information to the sacral parasympathetic nerves, which causes an erection. Nocturnal erection is also a conditioned reflex after a prolonged period of low flow in the penis to keep the penile corpus cavernosum adequately nourished with blood. Penile erection is induced by a series of procedures to increase the intracavernous arterial perfusion of the penis, firstly by an increase in penile corpus cavernosum volume and pressure to induce a full erection, followed by the infusion of fresh and oxygen-saturated blood to maintain penile erection and nutrients required for cellular metabolism, and in the presence of adequate oxygen saturation The synthesis of vasodilator factors related to the erectile function of the penis takes place under adequate oxygen saturation. Therefore, the erectile state of the penis during sexual intercourse is a beneficial functional manifestation for the maintenance and preservation of penile erectile function itself. The more you use it, the better it is, and the less you use it, the better it is. This is a very similar analogy to the “sharpening of the knife”. For healthy men who use abstinence for health, it is not good for the maintenance of sexual function. Of course, we also oppose indulgers, because excessive sexual activity is also a kind of overdraft damage to the accessory gonads and other organs. Because the steel knife is too sharpened only “iron” left, it will not work. Think about it: indulgence is not good, abstinence is not good, so what should be done? Do you have the right idea?