It is recommended to have sex about 2 times a week, but the specific frequency of sex will be different for each person and other situations. Sex between husband and wife can strengthen the emotional bond, improve physical fitness and tacit understanding between husband and wife, usually, it is recommended to have sex about 2 times a week. However, due to individual differences, if a person is 20-30 years old, sexual activity is in a period of exuberance, may have sex about 3 times a week. Therefore, the frequency of sex life between couples cannot be generalized. Appropriate sexual life can relieve physical and mental fatigue, beneficial to the emotional exchange between husband and wife, conducive to physical and mental health. However, sexual life should not be carried out frequently to avoid affecting health. Sexual life between husband and wife should be in moderation, so as not to have an impact on the body. When having sex, pay attention to hygiene to avoid infection.