Coming from a family with a very high percentage of left-handers (about 7 out of 10 on my Mother's side)...I can sympathize. The older ones who went through forced "right handed training" struggle with a host of psychological issues as a result of this forced training (not to mention some physical scars as the use of the "sinful" hand was beat out of them). The long-term effects have never been well studied because when the practice was common, there were social pressures not to and now the practice has mostly stopped.