I can mouse equally well with either hand but how often do you find a mouse on the left side of a keyboard? Keyboards themselves are arguably left-handed device

I can mouse equally well with either hand but how often do you find a mouse on the left side of a keyboard? Keyboards themselves are arguably left-handed devices, influencing the decision to mouse with the right further. Similarly, I 10-key right-handed. Many things I do right-handed are not preferences but just learned responses to how the world works.