Sun Simiao said: "People are angry and their qi and blood are unstable, so they have intercourse, which leads to carbuncle." . "great joy and great anger ... can't be yin and yang." In the Ming Dynasty, Gong Tingxian also said, "When you are angry, you do all the sex, and you are exhausted, which is carbuncle;" In the fear world, yin and yang are weak, sweating and night sweats, and overwork becomes a disease. " These are all saying that seven emotions are too strong to have sex. The seven emotions are out of date, the qi and blood in the body are in a state of disorder or stagnation, the essence is blocked, the sexual life is difficult to satisfy both parties, and the sexual response mechanism cannot develop in an orderly manner. At this time, sexual intercourse aggravates the disorder or stagnation of qi and blood, consumes essence and affects health. Sex may also cause physical and psychological trauma to one party, leading to sexual dysfunction such as low libido, frigidity and lack of orgasm. Regarding human taboos, medical books of past dynasties also emphasized that when there are strong winds and heavy rains, severe heat and cold, solar eclipses and lightning earthquakes, heaven and earth are sympathetic, and yin and yang are out of balance, so it is not appropriate to share a room; If you are full, you lose money, and you have everything, don't share a room. If you don't know how to avoid it, you will lose your health and shorten your life.