Early worship is related to reproduction. According to Yi Zhongtian, Nu Wa should be called "female frog". The original image is a frog, because frogs have many eggs, which symbolizes the prosperity of future generations. Later, the matriarchal society changed to a male society, so Fuxi appeared. Fuxi was in the shape of a snake, and the image of Nu Wa also changed and became the image of a snake. Snakes are like male genitals, so the worship of snake image is also a kind of reproductive worship.

Reproductive worship is a common custom in primitive society. It is the expression of primitive ancestors' pursuit of happiness and hope for prosperity. The so-called reproductive worship is a kind of praise and yearning for the reproductive ability of biology. The main parts include: genitals, breasts and buttocks. The main performance is to exaggerate these parts, or replace them with other images and worship them. So that's how Nu Wa and Fuxi came in.