The generation of the appellation of parents, that is, the words "father and mother", follows the distinction method of "replacing the whole with the partial". That is to find two completely different things from parents to represent parents themselves and to distinguish them. Because at the beginning of language, human beings were not wearing clothes. Therefore, as a child, when I am with my parents at ordinary times, I can see every place exposed by my parents at a glance. The most obvious difference between parents is the penis on the father and the breast on the mother. Therefore, with this kind of search, children have the title of parents in their eyes, that is, he (she) uses penis instead of father, and uses it to call father; Replace the mother with the breast, and also use it to call the mother. The word "dad" actually means penis, while the word "mom" represents breast. "Dad" is an pictograph, which consists of "father" and "ba". The left and right strokes on the word "father" represent two arms, while the left and right strokes below represent two thighs. And the word "ba" under the two thighs represents penis. Nowadays, there is a word "ba" in the vulgar appellation of men's penis, such as "Ji (homophone) ba" In rural areas, people call children's penis "minibus" and also have the word "ba". In addition, the phrase "tail" also has "ba". It can be seen that the word "dad" actually means "the penis under the father's body" The meaning of the word "mom" is even more obvious. The common name of breasts is "mother". In today's life, calling "breast" as "mother" still exists and is commonly used. In this way, because the word "parents" is very practical and practical, it has been called down by people. With the development of human beings and the continuous spread of language, when human beings are no longer naked and put on clothes, people can't see the two obvious characteristics of their parents at this time, but this has not affected people to call their parents "parents". Because at this time, it doesn't matter how "parents" came into being in the first place and what they represent. What matters is that these two words can represent parents and be well known by everyone. At this time, the real use of the word "parents" is application, but its meaning is completely unimportant. Then, when human beings have the concept of honor and disgrace, the title of "parents" for parents may be replaced. Because they have the meaning of insulting their parents. However, this kind of address has never wavered, and it has been spread to the present, which shows that in the long history of mankind, people have forgotten the true meaning of "parents". Now I will raise the meaning of these two words again, and I have no intention of despising my parents. Just from the perspective of human history, to objectively discuss this matter. From the origin of parents' address, we can see that human beings have language before clothing. In the development of language, there were neutral words first, and then under the emergence and development of the concept of honor and disgrace, the original neutral words gradually produced praise and criticism.