It is certainly possible to have sex once a day, as long as the couple does not feel fatigue, and both can achieve a state of pleasure, then once a day sex will not affect the physical and mental health. If you are feeling tired, it is recommended that the frequency of sex be appropriately lengthened. Sex life how long a suitable, individual differences, the demand for sex life is not the same, so basically young people sex life frequency will be relatively more, and older people sex life frequency will gradually reduce, so every day a one-time life is a normal state. However, it is important to note that before and after sex must do a good job of cleaning, so as not to cause infection.