There is usually no time of day when it is appropriate to have sex. For those who need sex, there is no need to pay too much attention to the time and pay attention to sexual hygiene. There is no time limit for sex in a day, so there is no time limit for sex. If you want to have sex, you should pay attention to sexual hygiene, frequency and intensity of sex, and do not need to pay too much attention to the time of sex. For those who want to have children, they should have sex at the time of ovulation to increase the chance of successful pregnancy. For those who do not want to have children in the near future, it is necessary to take proper contraceptive measures during sex, such as wearing a condom throughout the whole process to reduce the chance of unwanted pregnancy. After sex, you should pay attention to appropriate bed rest, avoid continuing heavy physical labor, to prevent overwork, and timely use warm water to wash the penis or perineum to prevent infection. If there is bleeding during or after intercourse, you should consult a doctor in time.