The other day I saw a video in which a right-handed luthier demonstrated a guitar he'd just finished, remarking in passing that it was a left-handed guitar but he'd do his best. The bugger played better than I do with my git the right way round. I'm strongly right-handed, but my left hand has learnt to do quite delicate things that my right hand can't manage.
This is an interesting topic (pace ESL). I'm seriously left-sided: left-handed, even better with my left-foot than my right, bat and bowl left-handed, though not at the same time, hold single hand tools in my left hand, etc, prefer turning right hand corners to left-hand ones, etc. But here are two things I do right-handed which are products of upbringing. I eat the knife and fork course "right-handed". I think this may be because I'm from a large family and you sat where you were put and just picked the implements up where they lay. But I suspect this is also complicated by the fact that I think right-haders missed a trick when they were designing the world. I find it much easier to find my mouth with my left hand. The same observation is true for stringed instruments - I learned on my brother's guitar so never even thought about changing the strings round. And I think I've got my (by far) best hand doing the hard work, although I was always a good right hand picker till arthritis took it away.
Now, Jimi Hendrix played predominantly left-handed with a right-handed guitar turned over, and without changing the strings round. But he was very competent with it the right way up, too. It's no wonder God got angry with him. We are both about equal in competence now.
I usually wear a watch on the table somewhere.