DNA was a somewhat big organ inside your chest, and your soul was this yellow glowing orb inside of you... also in your chest.
Don't ask where I thought the heart fit into this model, I clearly had not thought any of it through
I also believed you LITERALLY had to marry, AGAIN, if you wanted another child after the first. I distinctively remember asking my mum this when she asked if I wanted a sibling, "but wouldn't you have to remarry dad for that? :o" fbskfnsjfj
EDIT: You know what I am editing to provide even more clarity on that last point. My parents were not divorced. To me, that didn't matter. They would HAVE to remarry even if THEY WERE ALREADY MARRIED. Welcome to my twisted fucking mind kind of shit.