Leah you assume that boys and girls are the same (80% overlap on 75% of psychological traits) and ascribe behavioural differences to "playground social conditioning".   But what if some differences really are due to gender? 

For example I recently went into the Bay in Toronto. The store dedicates four whole floors to women's beauty products, lingerie and clothing.  The guys--one measly floor is enough. What's with that? Is this a result of the patriarchy's malign influence--or do women of  their own free will like to spend more on their appearance than men do?