Are pretty girls more mature than plain girls, or is it only an impression?

pretty girls have self confidence, friendships, knowledge of relationships, and social value, and they normally look more mature. Is the maturity real or is it just appearance?

Pretty girls are more mature, because they have many experiences, even negative
it's just appearance. They're emotionally instable, because guys mistreat them and other girls hate them
Pretty girls are simply shallow, because life taught them they get anything without effort
Plain girls have deeper personality, becuase they need to use brain to be accepted
Plain girls hate pretty girls, and this make them shallow
Pretty girls have more sex, and sex teaches a lot
Pretty girls are desired, and they can choose the guy they want. But they don't mature this way
Select gender and age to cast your vote:
Are pretty girls more mature than plain girls, or is it only an impression?
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