This is caused by people's adaptation to the natural environment in the process of evolution. Only by constantly adapting to nature can organisms survive and develop, just as Darwin said in the Theory of Biological Evolution, "Natural selection is the only way to survive." One more thing, if you practice with your eyes on it and your head up, it will be crowded. There are fewer organs in the lower half of the face, only the mouth, and the head is low, which will look more harmonious ~ ~ ~