Sexual intercourse or sexual life is the source and the heart of life. It is the instinct of life reproduction, as well as a happy way of life. It is the most basic element for the continuation of human society and the key to maintain the relationship and affection between husband and wife, as well as family atmosphere. Sexual health maintenance or sexual health care is irreplaceable. A healthy sex life is good for both physical and mental conditions. Due to the national cultural tradition or religious belief, people generally hold a kind of unspeakable or guilty mentality, and fail to discuss with each other about it, which may lead to a variety of psychological problems. Sex shall be avoided as people are with poor mood, physical fatigue, or diseases, in abnormal weather or special days, after drinking or a long distance of travel, before and after pregnancy. It is suggested to learn sexual knowledge and skills, so as to make some temperament and interest for healthy sex.
