Hello Petra5ed: I don't know the answer to this. But what I would presume is that the reaction you have & the feeling you experience is as a result of neuronal pathways that were forged in your brain over the course of your life. Some of this could also be due to genetics. But, basically, the electrical impulses in your brain have certain preferred pathways they've worn over the years. And so, unless & until new alternative pathways are formed , those little electrical impulses will just keep scampering around the same old pathways... That's my theory at least.