The morphology, function, and complexity of the modern phone is such that it probably isn't even recognisable as a phone from even thirty years ago. The concept of what a phone is has gone through so many changes, from a device that sends audio down a physical line, to what it is today that very rarely even has a physical line attached, that it probably demonstrates how words and identity can evolve new meanings better than any other example you could have picked.
Do physical conditions exist (XXY, XYY, etc) exist? Yes they do, but what we're seeing today is mass hysteria around a mental issue. What should be done is start looking at the underlying causes. Hormone imbalances? childhood trauma? Depression? Wanting out of the current lifestyle? Lack of religion? People with too much time on their hands that they start inventing problems? All these and more should be investigated
Ah. You have a very limited background. Right.
We have been the same species for thousands of years. And for thousands of years there have been male and female (sex) groups that have presented as men and women (gender), that is not the same as the one you might assign to them. (The galli priests of Rome, the Hijras of India, the khanith of Arabia, etc.)
And no... No, a child is not always able to tell them apart. Nor does a child, necessarily, instinctively call them either man or woman. If you were to ask a child of the Tiwi tribe what one of their ladyboys are, today, man or woman, they would answer "ladyboy". If you press the point - the child becomes confused. The ladyboys have been present in the Tiwi for roughly the last eight to ten thousand years or so ("kirrijamiyagirraga" in Tiwi). They are as much a part of the social fabric as man or woman. Tiwi is a gendered language, and has three genders (kirri - male, makirri - female, rraga - ladyboy), as well as a fourth tense that is used for gender-neutral terms (ramiya). And, well, if you assume that they're all genetic males, you'll get that wrong as well.
