Why do people hate picking their noses?

I hate this expression because of social etiquette problems, health problems and image problems.

1, social etiquette: In many cultures, picking one's nose is considered impolite or inappropriate. Therefore, the expression of picking one's nose may be considered inappropriate or unpopular.

2, health problems: picking your nose is considered an unsanitary behavior, because your fingers may come into contact with bacteria or viruses in your nostrils. Therefore, the expression of picking one's nose may arouse people's concern about health problems.

3, image problems: the action and posture of picking your nose may leave a bad impression, which is considered rude or uncivilized behavior. Therefore, the expression of picking your nose may be considered to be out of line with the social image.