I've flexed before about having the world's best blood type: O-negative. For some reason, all niceties around boasting vanish in the face of this natural-born superiority. If the first-responder rubber bracelet they sent me matched any of my clothes (how could it? It's the colour of blood), I would definitely wear it everywhere I go. Last week, though, for the third time, I got turned away from donating because my iron wasn't high enough.