When I was in high school I brought me all the fingers in my right hand once and while they were healing I wrote left handed
Once healed I went back to right handed even though a couple of teaches wanted me to stay writing left handed as my writing was better left handed
But I think because if a teachers in primary school wrapping my knuckles whenever I used a pencil left handed it became engraved in my mind to write right handed
I to can use either hand for controlling the mouse
With most sports I bounce back and forth
Darts bowling table tennis etc