@Fredward: Female and male aren't opposites? Even if your able to catch a fly with your butt checks, the fact that female and male are opposite genders won't chance. Maybe you mean "Females and males aren't as different as people think they are".
And people are different. If we stick to females and males, they do have indeed a different set of genitals and there are other biological differences between females and males which have psychological differences as a consequence.
That doesn't mean females and males should be treated differently. But it does mean that, even when females and males are treated completely equal, statistics will still show a difference in female and male behaviour.
This is even more complicated if you think about the fact that quantity and chemical composition of "the stuff" that influences human development into a female or a male can vary from person to person. So there are females and males, which won't behave like statistics tell us they shoud.
Long story short:
Humans are individuals not a collective. Everbody is different, for this reason it should be possible for everyone to fulfill his needs if this doesn't conflict with the needs of others.
PS: This doesn't have to do alot with PoE. Sorry for that.