Sex life duration should be based on personal constitution, each person in the sex life time will be different, frequency is also different, generally five to ten minutes or so is normal. With the increase of age, the frequency of sexual life will also be reduced, in time will also be shortened, because the age of the growing body resistance decline, sexual function demand will also decline. It is recommended that before and after sex to maintain a happy mood, you can listen to more soothing music, appropriate massage caress, increase the body’s needs. To develop good habits, pay attention to pubic hygiene and cleanliness, wash before and after sex, avoid unclean sex history. Sexual intercourse should be prohibited during menstruation to avoid causing gynecological diseases.