This is going to Hurt (a bit)
As far as our primitive survival instinct is concerned, any pain is bad or dangerous. It doesn’t compute that medical science has given us the means to live longer and be healthier and that some of the ways it does that will hurt. It is this neurology that also objects to the drawing of blood, which can be a very specific form of needle phobia based on the fundamental fear that, if we’re bleeding, we might die.