What does it mean that everyone has Mao Mao? Why is there hair on people?

1, actually this is a passage from a song called "Mao Mao Brothers". The lyrics of this song are all about Mao. The whole song is about everyone's hair and the importance of Mao Mao. Later, it was spread to Tik Tok and became popular.

2. Why do people have hair? Body hair, collectively referred to as body hair, consists of layers of protein scales. Some creatures have different body hair because of different seasons. Even for the same species, the color and growth rate of body hair are different. Some creatures have different functions, such as keeping warm, detecting, indirectly triggering tactile receptors and camouflage.