>>>>>>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.

You worry too much ;-)

UPDATE: Old joke -- guy goes to a psychiatrist's office. The doc asks what the problem is. "I'm a teepee, I'm a wigwam, I'm a teepee, I'm a wigwam, I'm a teepee, I'm a wigwam." The doctor stops him. "I see the problem already. You're two tents."

(sorry)