About girls' self-esteem?

Have you noticed that even if he argues or fights with a panda-like man, the girl in question will say to him, "I'll beat you!" He can say something like this or hit him. Where does this self-confidence in girls come from? If men see someone a little stronger than them, they step back. Is the reason for this self-confidence in girls because they think that the other person will not hit me anyway, or because they act without thinking about the possible consequences, or because they cannot control their anger?

About girls' self-esteem?
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