Well, I do think it's a thing that it doesn't matter much unless you're a musician of a sport pro or so...
That thing of the mouse could give a clue that no-one is lefthanded or righthanded really and we are all ambidextrous really... I don't know.
For instance a piano player develops ambidexterity usually... but he would have problems to do the things he use to do with the right hand playing them with the other hand and the same for oppossite hands.
All I know that for me both sides of my body have the same learning ability.
I think that happens to many many people, not a little minority.
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