Many years ago I got burned pretty bad on my right arm, side and face. The worst burns were on my arm, with 1st, 2nd and 3rd degree burns from my fingers to my shoulder. After I was healed enough the doctor sent me to a skin specialist to discuss restoration to the worst areas on my arm. The guy said they could graft some skin from my butt to repair the worst areas on my arm, but there were no guarantees.
He also said the area where they would remove the skin from my butt would have a scar.
I told him no thanks, seeing as how there was a risk of the graft failing, why would I want to risk he failure only to create a new scar on my best side?