What are some things you didn't know people find unattractive until you read about it on the internet? And did it affect your self-esteem?

E.g. hip dips, other types of noses than small etc.
EDIT: PLEASE, DON'T READ THE COMMENTS IF YOU'RE ALREADY FEELING SELF-CONSCIOUS AND NEGATIVE ABOUT YOUR BODY. YOUR MENTAL HEALTH COMES FIRST! You are all beautiful.
Plus, "You Don?t Have to Be Pretty. You don?t owe prettiness to anyone. Not to your boyfriend/spouse/partner, not to your co-workers, especially not to random men on the street. You don?t owe it to your mother, you don?t owe it to your children, you don?t owe it to civilization in general. Prettiness is not a rent you pay for occupying a space marked ?female?." - Erin McKean


Source.