The "seven losses" mentioned in "On the World" refers to "one closure, two discharges, three thirst (exhaustion), four blessings (no), five annoyances, six disappointments and seven consumptions." Explained in modern language, the seven evils mainly refer to seven practices that are harmful to the human body during sexual intercourse, namely: rude and reckless actions during sexual intercourse lead to pain in the five internal organs, which is "closure" (adduction); During sexual intercourse, sweating profusely and exhaustion of essence is called "leakage" (leakage); Excessive sexual intercourse, too much sex, qi and blood failure, called "failure"; And "happiness" means that although there is a strong sexual impulse, it cannot be carried out because of impotence; During sexual intercourse, my heart is agitated and it is "annoying"; One party has no sexual desire, and the other party has forced sexual intercourse. At this time, both sides are very unfavorable to the woman's physical and mental health, just like being in a desperate situation, so it is called "absolutely"; When sexual intercourse is too fast, it is neither pleasant nor beneficial to the body, wasting energy. This is called "fee". The ancients used very vivid language to say seven practices harmful to body and mind in atrioventricular health care. If you commit the above seven evils, it will often backfire and lead to diseases. This explanation still has important scientific significance and reference value for us today. In view of seven practices that are harmful to human body in sexual intercourse, the ancients also put forward eight practices that are beneficial to human body in atrioventricular life, namely, "eight benefits", namely, "one is to treat qi, the other is to cause foam, the third is wisdom, the fourth is beast, the fifth is foam, the sixth is to steal qi, the seventh is to win the temple, and the eighth is to stay in the body." Here, the specific treatment methods of Bayi are introduced one by one. Namely: 1. Regulating essence; 2. Cause body fluid; 3. Grasp the appropriate handover opportunity; 4. store essence and nourish essence; 5. Adjust vaginal fluid; 6. Accumulate the essence; 7. stay full; 8. Prevent impotence. Sexual life has a pleasant feeling and enhances the feelings of husband and wife. "Seven damages and eight benefits" is the law that the ancients followed in their communication. In the process of sexual life, we should also be good at using the method of "seven damages and eight benefits" to adjust our sexual life. There should be a seriousness about atrioventricular affairs, so that life can be subordinated to the important principles of health care, and the purpose of tonifying the body and prolonging life can be achieved through sexual intercourse. "Seven damages and eight benefits" are all kinds of sexual health care measures and sexual taboo experiences summarized by the ancients in the process of atrioventricular health preservation. The theory of "seven damages and eight benefits" was first put forward by the ancient medical book Lun Shi Liang Fang. "Seven damages and eight benefits" is an atrioventricular health care method based on comprehensive mental health care, sexual physiological health care, sexual behavior norms, qigong guidance and other knowledge. Ancient atrioventricular hygienists believed that in sexual life, there were eight kinds of essence that supplemented people and seven kinds of essence that harmed people. If we can't use eight methods to replenish sperm and avoid seven methods to damage sperm, then people's sexual function will be halved by the age of 40, and their living ability will be significantly weakened by the age of 50. If the seven evils are avoided, the eight benefits can be used to treat diseases and restore the health of the elderly, so that mature people will not get old.