I am right-handed and there was never a doubt. However, it has been called to my attention that there are a few things I do left-handed and I had never noticed. For instance, I deal cards left-handed. I tried to switch hands once it was pointed out to see how that would work, and it was a disaster! There were cards everywhere! 52 pick-up anyone? Mr. M has pointed out a few things I do in the kitchen left-handed as well.