In many societies, efforts are made to "convert" children who are naturally left-handed to using their right hands. As I understand it, modern neurology strongly frowns upon this practice.
I recall stories of my (Polish) great-grandmother insisting on her grandchildren writing with their right hands; how much of that was Jewish, vs. Polish, vs. superstitious?
Was it more, less, or equally prevalent in Jewish societies vs. their hosts?
There are plenty of halachic discussions about left-handed people (with regards to all sorts of mitzvahs that specify a hand); at any point did our sources discuss this "correcting" practice?