Actually, ask yourself Comment what differences other than those associated with attracting the opposite sex and procreation are there?  Women and men are equally nurturing and not, equally good and bad leaders, equally emotional since anger is the strongest emotion of all and what men often use instead of tears per our societal training, both are equally creative and intelligent.  Both agree with the same sex as disagree with their same sex on almost all issues, both are passive and both can be aggressive in personality and action.  Both desire sex equally and despite what many old stereotypes state, they actually want sex about the same amount, and for the same reasons.  Even in sex women and men seek the same things and are aroused by the same body parts of the opposite sex - women are attracted to hard and hairy chests and men by soft, puffy, smooth breasts.  Both enjoy oral sex similarly.  Both claim to need and love God, country and family - so where is the great difference?