People in their forties and fifties should have sex about 4-8 times a month. The frequency of sexual intercourse varies greatly among individuals, depending on their age, physical or psychological state, so there is no standardized scale for the frequency of sexual intercourse. As age increases, the frequency of sex decreases. Usually, in the age of 40-50 years old about 1-2 times a week sex, in the age of 50-60 years old 2-3 times a month. If the body is relatively poor, you can appropriately extend the interval between sex; if the physical state is relatively good, the appropriate sex life as well as the normal number of sex life can improve the quality of life of couples, can enjoy the mood, enhance the relationship between husband and wife, but also to prevent the occurrence of disease. In addition to age, physical and mental psychological state, environmental factors, living habits, work pressure, husband and wife relationship and other factors, will affect the frequency of sex life. Couples should pay attention to their sexual life according to their own physical condition, to maintain regularity and moderation.