if we had skills like that would any of you eat nasty stuff to improve your resistance to them? Technically we do have that to a degree as milk is a great example, poisons to a much lessar degree. Shit I'd cut myself to improve bleed resistance. I hate getting small lacerations in sensitive areas. Had it happen in my armpit and it stung to sweat, lift my arm, deodorant stung all day, and shows felt none to good either. It can even happen on your foreskin if you're uncut and it is more likely to happen there.