Sure there are XY females and XX males, but combined, they make up what...less than 1% of the population? Therefore, there's not even a point in bringing them up besides to just mention that they exist. Oops, forgot about the militant liberalism and "I'm always right" syndrome. We better not even acknowledge male/female sex or gender, because there are less than 1% of people who are a little different. While we're at it, since these people are inherently different, let's throw a bunch of money at them too....
So the XY/XX argument may be "insignifcant," but the following point made by Mokele is still valid.
So, if an individual, due to developmental anomaly, possessed the body of male but the mind of a female (or vice versa), what are they? Given that the brain is what gives us personality, memory, thought, behavior, and generally everything that makes us what we are, I say the brain is the deciding factor.
There are lots of developmental stages that can affect standard development. Much of it has to do with when estrogen and testosterone are pumped into the baby in the womb. During the first brain developing stage if the estrogen is pumped higher and then during the genital development is conversely testosterone, you'll have a person that physically identifies as a man and mentally (whether cognizant of this or not) identifies with females.
That happens a lot, and it's on a spectrum so it might be so insignificant that it's not noticeable or socialization takes over. So it is still a very pertinent discussion point.
xvart.