First, don't have sex with illness. People who suffer from some serious organic diseases and are told by doctors not to have sex should not be forced to have sex; Sexual intercourse should also be avoided when suffering from tuberculosis and infectious diseases; Especially suffering from some kind of sexually transmitted disease, no sex life. Having sex with illness not only hurts yourself, but also passes it on to your lover and should be avoided. Second, don't get tired of sexual intercourse. Sexual life consumes some physical strength and energy. When you are mentally or physically exhausted, you often can't reach orgasm and get satisfactory results. Especially having sex immediately after fatigue will damage your health. Third, don't be unhappy and force yourself to do it. Some couples make love reluctantly when one of them is in a bad mood, which will not only lead to the harmony of sexual life, but also make the one in a bad mood feel disgusted. If it happens repeatedly, it will lead to the woman's frigidity or the man's impotence. Fourth, don't have sex during menstruation. During the woman's menstruation, the cervix is open, and sexual intercourse is very susceptible to infection, leading to inflammation of the uterus or accessories. 5. Don't have sex after drinking. Some people are used to having sex after drinking, and some even think that having sex after drinking will "improve their quality". In fact, after drinking, especially after drinking a lot of hard liquor, it will lead to the man's penis erection is not firm or premature ejaculation, thus hindering the harmony of sexual life; And pregnancy after drinking will endanger the fetus. Sixth, do not talk about hygiene. Living in a dirty and chaotic environment will affect the mental state of both men and women and interfere with the success of sexual life; If the sexual organs are unsanitary, it will also pose a threat to the health of the other party, bringing pathogens such as bacteria into the other party's body and damaging the health of the other party. On the contrary, a clean and pleasant environment, cleaning private parts before sexual intercourse, is not only conducive to the health of both sides, but also conducive to harmonious and happy sexual life. 7. Don't worship the idea that men are superior to women. In sexual life, the man does whatever he wants, does not listen to or respect the woman's self-esteem, which not only destroys the relationship between husband and wife, but also makes the woman gradually feel disgusted, which eventually leads to sexual apathy, which in turn leads to the breakdown of the relationship between husband and wife. Eight, don't be unprepared and act in a hurry. Some people don't understand the particularity of women's physiology, and they are eager to have sex without adequate preparation, or they retreat hastily because of the rush of time. These practices can not make the woman reach orgasm, not only will not be interested in sex life, but will bring pain, which is the main reason for women's indifference. Nine, don't have a full or hungry sex life. Because of satiety, the gastrointestinal tract is full and congested, and the blood supply to the brain and other organs of the whole body is relatively insufficient, it is not appropriate to have sex just after eating; On the contrary, when you are hungry, people's physical strength drops and they are not full of energy. At this time, it is often difficult for them to achieve satisfactory results in making love. Ten, don't be too nervous or shy. More common in newlyweds. Because of extreme nervousness or shyness, it is easy to cause premature ejaculation or pain during sexual intercourse, which affects sexual pleasure. Try to stay relaxed and happy, and the woman doesn't have to be shy about it. She should be calm and generous, actively cooperate with her husband, and make her sexual life harmonious, complete and happy. Eleven, don't have sex after taking a shower. Having sex immediately after taking a shower will make the blood circulation smooth and unbalanced, which will affect your health. Twelve, don't have postpartum sex. If you have sex prematurely after delivery, it is easy to cause poor uterine involution and uterine bleeding. Thirteen, don't "five more colors." "Five colors" means having sex before dawn. Because both sides can't get rest, their body balance is out of balance and their resistance drops; It will also affect the efficiency of work and study because of excessive fatigue.