Clinical often encountered such a problem: newlywed men usually complain that their wives are a little sexually indifferent, while most young wives think that men are too eager to sex; on the contrary, women in their thirties and forties are often more eager to sex than men of the same age, and at this time the men are often tired to cope with or have more than enough power. This kind of situation fully illustrates the reality of life, people are not only concerned about the quality of sex, but also very important to the number of sex, the frequency of sex is not coordinated is also the reason why many couples have conflicts and even arguments. Of course, there are many people who consult out of concern for their own health and that of their partners: “At my age, how many times is more appropriate?” They worry that too much or too little sex will affect their health. In fact, because sexual desire varies so much among individuals, the frequency of sex can vary a lot even among different couples of the same age, so never take someone else’s frequency as your own standard. Most people can refer to the following two standards. Modern Western sexologists recommend: the tenth digit of age multiplied by 9, the resulting product of the tenth digit is the time, the single digit is the number of sexual intercourse should have during this period. In the 30s, for example, 3 × 9 = 27, that is, 7 times in 20 days to have sex, about once every 3 days; and so on, people in their 40s about once every 5 days; people in their 50s about once every 8 days …… Sun Simiao, the king of medicine in the Tang Dynasty, described in the “Thousand Gold Essential Formula” that: those who are 20 years old, the day again (twice a day), the deficient one day; those who are 30 years old, two days a day, the deficient three days a day; 40 years old, three days a day, the deficient four days a day; 50 years old, five days a day, the deficient ten days a day; 60 years old, 10 days a day, the deficient 20 days a day; 70 years old, 30 days a day, the deficient not ejaculate. However, these are only artificial regulations, and the real-life situation may not be in line with the sex life is often a love of the desire, the thing to do, so couples do not have to accept any rules and regulations of the constraints, according to their own situation and needs to adjust to their own, belong to their own reasonable frequency. Modern sexual medicine believes that the frequency of sexual intercourse is the appropriate sign: both husband and wife are recognized, and after each sexual life both parties feel invigorated and comfortable.