Most people are right-handed. A right-hander usually uses a mouse with his right hand.
A right-handed baseball glove is worn on the left hand, so that is not it.
I am left-handed. I use a mouse with my right hand. By doing so, I can take notes while mousing through a display. It is very convenient.
A right-hander could do the same if he used a mouse with his left hand instead of his right.
Why don’t you?
What else are you doing more awkwardly than you need to? What am I doing more awkwardly than I need to? I happened to notice this one item. What else are we missing?