I know this may stir some debate, and my disclaimer is that this is a generalization and not applied to each individual person.
This is my assumption... female and male personalities develop different. A boy is can be rebellious and a "handful" at a young age, may become a mess in his adolescence, but mellows out more as he ages and matures. A female, on the other hand, wants to please and mostly in good spirits as a young girl. This lasts maybe up until somewhere in adolescence, then they become moody, roll their eyes, and go "uggghhhhhhhh!" and easily annoyed. By the time they reach adulthood, they are likely broken in some way, maybe potentially from trauma of some kind (1 in 3 females face sexual abuse/trauma in their youth). They become critical and difficult to please, and/or they learn not to give their heart so easily.
