With the popular view of “sexual liberation”, people’s attitude towards sex is gradually open, but limited by the influence of traditional concepts, sex is still a topic to be avoided around us, which more or less leads to people’s half-understanding of sex or even ignorance. It is important to be sexually open, but it is even more important to have the right knowledge to face sex and protect yourself and your lover. Sexual movement, that is, sexual behavior, as the name implies, is the human in order to reproduce offspring, to meet the sexual desire, to obtain pleasure and other sex-related actions and activities, including but not limited to sexual intercourse, masturbation, caressing, kissing, etc., usually refers to genital intercourse. Modern people’s sex life has long gone beyond its fundamental purpose of reproduction, but for the dual physical and psychological pleasure, and then communicate love and emotion. Some studies have concluded that a moderate sexual life is good for health. For men, regular ejaculation is conducive to reducing the occurrence of non-bacterial prostatitis, but also to enhance physical strength, improve immunity; and for women, sex can effectively improve estrogen levels, has the effect of lowering serum cholesterol, promote urinary health. In addition, a harmonious sex life can also reduce mental stress, promote metabolism, detoxify the negative emotions brought about by the accumulation of sexual desire, etc.. However, when having sex, some things need to be noted: 1, before, during and after sex should pay attention to hygiene, timely washing and cleaning of genital parts, choose a safe, clean and private environment to avoid bacterial and other pathogens infection; 2, no pregnancy preparation plan must wear condoms, even if there is a pregnancy preparation plan, should be prepared after the medical examination; 3, do not have more than one sexual partner at the same time, the possibility of cross-infection is very high The risk of transmission of STDs, AIDS and other diseases is also greater; 4. Do not have sex during menstruation, early pregnancy and other special periods to avoid inducing uterine or adnexal infections; 5. Be sure to communicate in a timely manner and be sure to speak up when you feel uncomfortable to avoid injury. There is no absolutely safe sex, but relatively safe protection measures, adhere to each use of condoms, good cleanliness and hygiene, is an effective way to prevent disease infection, to avoid unwanted pregnancy, to protect themselves. If you know how to use an umbrella when it rains, you should also use a condom when you enjoy sex, right? Reference: Chinese Encyclopedia of Sexual Science, Editorial Committee. Chinese Encyclopedia of Sexual Science [M]. Beijing: Encyclopedia of China Publishing House, 1998.