How long a couple’s sex life is normal, individual differences are great, there is not a clear rule, as long as both spouses can accept and do not appear tired and weak and other discomforts are normal. Generally speaking, young couples generally 2~3 times a week is more normal; middle-aged couples generally 1 week; elderly couples generally no more than 1 month a time. 1. Generally speaking, young couples, especially newly married couples, more robust, and more energetic, the desire for sexual needs higher, so the number of sexual life will increase significantly, sexual life may reach once a day, generally 2-3 times a week in about normal. 2. middle-aged couples from the physical conditions, the physical function gradually decline, the demand for sex will also gradually decline, generally keep 1 week about 1 time is more normal. 3. The elderly body is relatively weak, the demand for sex between couples further decline, according to their own physical conditions generally no more than 1 month a time or so is more normal. Due to the different physical condition of individuals, the demand for sex is also different, the specific circumstances need to ask a professional doctor.