By the way, research shows that guys think they are more intelligent while girls think they are less intelligent than they really are. I would like to propose a

By the way, research shows that guys think they are more intelligent while girls think they are less intelligent than they really are. I would like to propose a theory of why intelligent girls have more doubts about their intelligence than intelligent guys. High intelligence is an asset. You don't want your competition (in social situation) to know that you're smart. So it's generally better for you to believe you're not that smart, yet be in reality. However, for males, this is different; they need to show off to attract females. So they need to display their intelligence (because it's a desirable trait) despite the above. That's why they act as they were smarter than they really are. It's similar to why in many birds, males are often wildly colored, while females have masking similar to the environment.