>>>>>>I am old enough to remember school desks that were entirely designed for right handed writers.
>>>>
>>>>Also scissors and specialist tools - even driving a screw has muscular/mechanical advantage for a right-hander.
>>>
>>>A screwdriver is a completely symmetrical tool, so that leaves the screw. This would mean that lefties have some advantage when unscrewing, eh? Well, I beg to differ - the difficulty depends on many other factors, the direction of the thread being a distant fourth. I'm trying to practice both hands in as many applications as I can, and driving screws is where I'm pretty ambidextrous (writing... almost there, lacking speed, smooth moves and readability but got the rest :). I don't see that it's less handy on the left.
>>
>>Can I ask why? Just for the challenge of it?
>
>Partly. At some point, in my early twenties, I got scared shitless about what if I lost my right hand - would I be just stupid and helpless in that case? So I thought I'd rather prepare for the case. Turned out very interesting. Writing, somewhat of a challenge, but not much. After a while I could write with about third the speed and twice the ugliness as with my right. Eating utensils, easy - within a week I could switch spoon, fork, knife in either hand. Cutting meat was a bit of a challenge - the right hand didn't hold the steak with the fork properly. Chopsticks - passable without much practice. Hammer, axe - no way I can have both strength and precision at the same time. Saw, screwdriver, pliers, tongs, brushes - easy. Sandpaper... not easy. I just can't do the proper motion with proper pressure. Even when filing my fingernails, I always shake my right hand.
>
>I guess some psychologist could do a thesis on me.

He would probably ask whether you prepared for the loss of both hands by practicing with your feet. And possibly for the loss of both legs by practicing with a wheelchair. Or possibly........