User blog comment:Mabr/Vampire anatomy/@comment-206.176.35.1-20100113220501

(FIRST)they cain't do it its a survival instinct they have that prevents them from harming them selves that way. it won't let them(edward is an example in new moon he couldn't do it otherwise he would have) thats why the only wayy he could have would be as if he got someone else(the Volturi) to do it for him.