There is no clear standard time between sex, and personal physical condition, age and mentality and other factors have a direct relationship. Usually, if both parties are in good health, young people can have sex every 2-3 days, middle-aged people 3-4 days, middle-aged and elderly people every 4-5 days, and the elderly should do what they can. Good regular sex life is good for physical and mental health, help promote sleep, burn calories, control weight, release stress, delay aging, and can promote the exchange of feelings of the couple. The time of sex varies from age to age, such as normal people’s sex time is about 5-15 minutes, after the increase in age sex time becomes shorter, but most belong to the normal situation. However, if ejaculation occurs in less than two minutes, consider premature ejaculation reaction and need to take reasonable treatment. In short, the frequency of sex needs to be based on their own situation, although the benefits of sex more, but should not be too frequent, so as not to let both sides produce continuous fatigue, inattention, shortness of breath heartbeat, loss of libido and so on.