The back of my head is flat, too! But I don't know what a double crown is. I can't wear low ponytails or other similar styles, because (to me, at least) all you see is the flat back of my head. What's weird is my hair was very, very (like Judi Dench) short for years, and the back of my head didn't bother me then.

It's awe-inspiring what a complex relationship you can have with your body, or even just parts of it. I think about my hair all. the. time.

I want to see a picture!