Second, sexual intercourse is all animals (creatures? ) is the instinct to maintain racial reproduction. This self-learning ability is common in all animal groups in nature, so it is natural for men and women to have children after sexual intercourse. It can often be seen that small animals in sexual germination often have "game" behaviors of crawling and mating, which is the embodiment of sexual instinct.
Third, human sex education, or more emphasis on sexual knowledge, sexual safety protection (contraception), sexually transmitted diseases prevention, sexual intercourse skills and prenatal and postnatal care. In essence, sex education advocates "safe and pleasant sex" education, and there is no necessary causal relationship with giving birth to children. Parents can have children through sexual intercourse without sex education.
Fourth, it cannot be said that parents have never experienced sex education before. Sexual intercourse ability is human instinct, but it may be degraded by artificial imprisonment, so human beings gradually appear active sexual education practice, and adults teach the next generation sexual intercourse knowledge. For example, in ancient China, women who were poisoned by feudal ideas lived in boudoir for a long time except their fathers and brothers, and did not contact with the opposite sex before marriage. When getting married, parents often put some erotic pictures and sexual intercourse models in their dowry for reference. This is the secret sex education. Based on China's cultural tradition, sexual behavior is not elegant, so it is kept secret from outsiders and unknown, but it cannot be said that parents have never experienced sex education before.