I started doing things with bot hands years ago in order to level out the amount of pain I suffer from widespread arthritis. Recently I got a pinched nerve in my right shoulder which affected the motor skills of the right hand. I'm right handed but was able to do most of my things left handed because of the dividing of my work loads equally between sides. I recommend this as a survival technique in case you lose ability in your dominant hand.
Same, my joints, ligaments etc ache with repetitive motion, so switching hands helps with that and improves coordination.
I tried switching my damn mouse back to right handed tonight, but it's still not cooperative. The left hand is way more accurate, which is what I need during my live radio broadcasts. It's helpful to be able to switch. Oh, I also shoot pool left handed in order to get those tough shots that people try behind their back.
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