Great point. Let me add a much longer textual take on this from a transgendered person: "Debunking Myth #11: Sex and Gender are Straightforward" http://catholictrans.wordpress.com/2013/11/18/debunking-myth...

I like this way of explaining things the best: http://itspronouncedmetrosexual.com/2012/03/the-genderbread-...