It seems that people are born with a 'body map' in their brains that sometimes doesn't correspond with their actual body, so that they feel there are parts missing that should be there, and other parts that feel like they've been sewn on by Dr. Frankenstein.
This is a rather dubious explanation. Firstly because it seems unlikely that such a process would mess up only the sexual characteristics that happen to be in the brain. Secondly, many of the high profile "transgendereds" claiming that appear to have been perfectly happy in the bodies they were born with until in became fashionable to declare oneself "transgender".
When I wasn't exposed to more transgender people and viewpoints, I didn't pay attention and connect the dots I had that pointed at my not being cis, since I'm non-binary with relatively mild dysphoria. So, I'm planning on getting top surgery in a year or two, and wouldn't have if I hadn't introspected and found myself to be not cis. This could be seen as being perfectly happy in the body I was born with until it became fashionable to be transgender, but the connotations are very different.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.