It’s safe to say that hardly anyone likes to see blood, especially their own. The mere thought even makes some people feel faint. After all, “seeing your own blood generally means you’ve injured yourself,” says Stephan David Küpper, spokesman for the German Red Cross Blood Donor Service. If you can’t stand the sight of blood but would still like to be a blood donor, he suggests trying what psychotherapists call cognitive reframing, which is shifting your mindset to view something in a more positive light. “You can get clear in your mind that you won’t be hurt and will be doing good with your b…