I am right handed, so, from an early age that was most comfortable for me. I would do it left handed from time to time, but it was always better right handed. However, over the years that has changed. Now I much prefer my left hand almost always. Maybe it was practice that made it more comfortable? Maybe the ability of typing and pointing and clicking with my right hand has something to do with it as well. Like I am doing now. Lol. Seriously, I have a slight curve to the left and it is most comfortable left handed now. I get a better look at my cock left handed too. Yes I love looking at my cock a lot. So, there you go. Just a few thoughts. Either way I have much experience over the years, but, my left hand gets the most action these days...