It is normal for men to have sex for about 3 to 10 minutes. Each man’s physical condition is different, so the duration of sexual life is not the same, generally more than three minutes is relatively normal, but some men have a longer duration, probably up to 10-30 minutes or so. If a man’s duration is shorter than three minutes, generally may be a premature ejaculation, but can not be based purely on the length of men’s sex life to determine whether the premature ejaculation, but also need to timely medical examination of various tests to be able to diagnose the disease. It’s best not to have big mood swings or be overly tired, as this may also lead to a shorter duration of sexual life. It is recommended that men who have abnormal sex life for a long time should seek medical treatment as soon as possible.