Sex life standard time is how long a time there is no standard answer, according to the formula announced by the American sexology experts in the sexology forum organized in China: sex frequency = the first number of age * 9, suitable for people over 20 years old, that is, 20 ~ 29 years old, sex formula for 2 * 9 = 18, that is, 10 days to have sex 8 times, an average of 1.25 days a time, and so on. The number of sexual life is different from person to person, can not mechanically with a number to specify, according to the specific circumstances of both parties to do appropriate adjustment. Sexual life frequency is appropriate, in order to cohabit after the body relaxed and happy, do not appear obvious fatigue to the extent that if cohabit after the feeling of waist and knee weakness, fatigue, is more than the individual capacity, the need for appropriate moderation. Too much or too little frequency of sexual life is not healthy, you can refer to the advice of experts and scholars to find the right frequency, regular sexual life. If you have any discomfort after sex, please go to the hospital in time to avoid delaying your condition.