My sister gave me the inspiration for this one:
On your computer, are you are mouser or a padder? Can you do it with either hand?
I am a leftie mouser, which sounds like a political affiliation. I learned to use a mouse when I went to work at a company where I did a lot of ten-key entry on the keyboard and it was easier to mouse with my left and enter the data with the right. I have tried using my right hand, but I’m terrible at it. As for the little mouse pad or pencil-head thing on laptops, forget it. I tried using them and I hate them.