Perhaps the best line in this entire thread.
I always believed the simple XX / XY story, and was surprised to learn of all the variations and inconsistencies that occur. But I probably shouldn't be, considering how complex the entire mechanism is.
I agree.
For most of us, this was something taught to us in middle school science and if one never bothers to look further into biology, this is a misconception that endures well into adulthood. Similar to historical shorthand, like the assumption that the American Civil War ended when the Army of Virginia surrendered to Grant at Appomattox when in reality it actually raged on for quite some time in other areas of the country.
This is one of the reasons I use the expression
nature doesn't make cookie-cutter people. This is true, even chromosomally. The further one digs into the mess that is our biology, the more one begins to see the fallacy that is gender and sex as things that are immutable, determined, or destined.
For example,
This. We're learning more and more about this kind of condition every day.
There is a terrible misconception that being transgender is something these men and women
choose, as though it is profession or which side they prefer with dinner. And the more we dig into it, the more we find, at least by the current available evidence, that when they tell us that their biology is telling them what their physical sex is supposed to be, they aren't suffering a delusion or engaging a fantasy. The parts of the brain responsible for identity very much are telling them this.
And it's difficult for cisgender people to wrap our heads around it. Because that isn't how we see ourselves. We don't have that incongruence. So the way we typically rationalize it is this something they
feel in some poetic way that has no basis in biology. And that's apparently not the case at all, at least by the evidence we have.
But that evidence complicates the simple XX or XY framework we grow up not questioning, and as a people, we tend to discard it and fall back on what is familiar and uncomplicated.