Ever wondered why men are generally more confident than women? It's because the boys from a younger age are allowed to go out into the world and confront society.
Traditionally , they are the ones who go hunting with father or go to play football with their friends or even attend school. Meanwhile the girls, on the other hand, are left with mother in the kitchen to cook, clean and take care of the home. How do you expect that girl to understand how society really works and gain the confidence she needs to stand up for herself in uncomfortable situations?
"Confidence is a result of experience."
Think about it.