another reason but is it fact and scientists wasting money

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Scientists have come up with another reason why we wear our watches on a certain arm. I always thought that I wore mine on my left hand because the winder would then be nearest my hand and if needed to wind it up it would be easier than if it was on my right hand and the winder near my elbow. Then we were told that it had something to do with us being left or right handed. Well yes this sounds good but my mum and dad were left handed and my brother and me right handed but we still all wore it on the left arm. Now scientists have come to the conclusion that it all depends on what side of the road we drive on. Being in England there is a good chance that I wear it on the left because i drive on the left. Americans on the right as that is the side they drive on. I wonder how true this is and how much it cost us for the scientists to find it out and how long they took.