I was listening to this (http://fuckyeah-portal.tumblr.com/post/10822810161/chicksdigthephoenix-pookie-is-a-corewhore) when I read this and it gave it a really surreal feel to the whole thing.
This is a beautiful idea to end up at from Dean calling Cas a child canonically. I really like the symmetry of forgiveness only accepted after physicality. I especially like the way you dealt with Dean giving Cas punishment as a way of cleansing.