What do you mean, "the red flag at home does not fall, but the colorful flags are fluttering outside"?

A red flag is a metaphor for a wife or husband, and a colorful flag is a metaphor for a lover. There is a wife or husband at home and a lover outside. Get along well with his wife and lover.

Cao Jing's theory of love belief holds that lover is a kind of love ethical relationship, which is different from marriage ethical relationship. Marriage is a controlled ethics with the intervention of the controller, while love is a voluntary ethics without the intervention of the controller. Marriage is a social system that controls the relationship between men and women. Whether it is married love or unmarried love, the sense of sacredness comes from the ethical relationship of love.

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The key reason for human evolution is that human beings have more complex and effective social relations. Through more complicated social relations, human beings can cooperate to face the cruel natural environment and produce more substances more effectively than other primates, so that human life will not only revolve around eating and reproduction.

It is the monogamous birth mode that makes human beings have more energy for social activities, rather than the male animals focusing all their energy on fighting for spouses and mating rights. The monogamous reproductive model makes it unnecessary for both sexes in the group to spend all their energy on mating and childbearing, and then the released energy can be used to do adventures and attempts that other primates will not do.

So as to exercise people's intelligence. So there is a difference between man and beast. Animals are just a pile of meat driven by physiological impulses. As human beings, they can think, taste love and experience the meaning of life.