My theory on the location is something of a "thrall" - like a gut feeling, maybe instinct, to be drawn to the place. That's how I ended up. I'm a born and raised Southern girl, moved around for work, and one day I looked at the map and felt the need to come here. Hard to understand.
As for the people who lived here for their entire lives...dream puberty? Comes at a certain time for different people in certain waves.
That's just my theories though. Mine tend to usually involve some sort of mystical explanation that tries to have a semblance of a logic. I tend to just let the dreams hit me and I'll reap the benefits of it. Aside from dying, they haven't been too bad.