The world of looking at faces shows that everyone likes people who are good-looking. On the other hand, why don't people like people who are not good-looking? Because in our subconscious, ugliness is often associated with illness. This is not to discriminate against ugly people, but in nature, diseases are often reflected through the physical appearance of organisms, such as skin infections, such as lupus erythematosus. Therefore, in the biological subconscious, illness will lead to changes in appearance, and changes in appearance are evidence of the existence of diseases. This kind of subconscious mind, in our more conscious life, becomes "ugliness equals illness or poor living conditions", so we don't like ugly people.