Why do some women hate it when they feel their thighs rub together when they walk?

I overheard some women talking among themselves where some say they hate it when they feel their thighs rubbing each other when they walk. Some are annoyed of it to the point they contemplate wacky diets or getting some lipo done. Others stated it as the reason they don’t wear dresses to minimize the rubbing feel. Why is that such a bother for some women? If it is, doesn’t that tell them that maybe they need to change their diet, activity level or both?