There is no definite standard for regular sex, and it varies from person to person and from time to time. Generally speaking, adults can have sex 2 to 3 times a week under normal circumstances. For men, the number of times of sexual life, if too frequent, can lead to lower sperm quality and quantity, and can also lead to listlessness, lumbar and knee soreness (the feeling of soreness and weakness in the waist and knees), panic and shortness of breath and other uncomfortable symptoms. Only a regular sex life can ensure the quality, quantity and mental condition of sperm. For women, sex life should also be regular, the number of sex if too frequent, can also lead to mental depression, chest tightness and shortness of breath, etc., and menstruation can not have sex, this is because during menstruation, the cervix will be open, the cervix will be congested with blood and edema, then sex is very easy to lead to infection, resulting in inflammation of the uterus or adnexa. If you feel depressed after sex, back pain, limb weakness and other discomforts, you should rest in time and reduce the frequency of sex, if the symptoms are not relieved, you should go to the hospital.