My bones don't break.
Not saying I'm invincible but I'm a 40-year-old woman and never had any broken bones after getting my head kicked in by a horse, hit by a truck, fell off a 10+ foot drop and landed head first on cement.
I've had x-rays and Cat Scans and multiple times have been told by doctors that it's physically impossible for me to not have any broken bones. I've even gone back in for them expecting my bones to separate after a few days and it never happened.
Best guess I can do is I've always been insanely active since I could walk from; ice skating, skate boarding, roller skating, swimming, baseball, basketball, volleyball, bicycling, horseback riding, walking and always being busy working. That's as a child. Then I've never missed a meal in my life and consume tons of protein.
So I'm assuming that may have contributed.