>>/22820/
This is just because there's death. Our hair dies on this earth.

In the new earth there's no death. We live forever.
So we get to keep our hair perfect, and the womb doesn't die. It frees us from the evil that is, time, that you may live 30 years without children and not be punished for wishing to have them after that.

Your hair and flesh stay the same complexion as when you were young, each hair forever a fine strand of gold if you were blonde (so your wife always gets to see gold shimmer in the sun when she looks at you).