It's adaptation. Most things aren't made for left handed people so you're forced to learn how to do things with your right hand. I do everything with my right hand except eat and write
I use my mouse/trackball with my wrong hand, trackpad I use with either, I shoot a bow and a gun wrong handed (bow because there were only righty bows when I learned, and a gun due to an eye injury injury and I had to relearn).
My parents were very supportive of my left handiness, my father even going as far as learning stuff lefty to teach me.
I golf right handed, bat either (but prefer left), pitch either (but prefer left becauxe I only had the one glove lol), scissors gotta do right handed or the pressure is wrong for cutting it seems like. When I eat I use both hands, not the cave man stab, cut, and switch hands for fork.
Not sure how it happens, but youre right, I do feel like I have decent mastery over both of my hands. My brother is a lefty also, but he's an obligate lefty so I'm not sure it's biological. I bet someone has written a paper on it.
scissors gotta do right handed or the pressure is wrong for cutting it seems like
Yeah that's exactly it. Your hands don't actually cut by pressing totally up and down. There's a slight lateral motion which, when using scissors in the hand they're designed for, pushes the blades away from each other where you're holding them, which has the effect of pushing them into each other on the other side of the pivot point.
When I eat I use both hands
Eating right-handed means the knife is in the right hand, fork in the left.
Outside of knife-and-fork eating, the spoon goes in the dominant hand, unless doing the spoon + chopsticks you get with some noodle soups, in which case chopsticks are in the dominant hand and spoon in the secondary hand.