I have a friend who's pretty good, and he's left handed but plays right handed. He just didn't know when he started. I also have a few friends who are left handed, but they play pool left handed. I guess when you're beginning something you don't know the difference so it doesn't matter.
"You must stab him in the heart with the Bone Saber of Zumacalis... well, you could stab him in the head or the lungs, too... and the saber, it probably doesn't have to be bone, just anything sharp lying around the house... you could poke him with a pillow and kill him."
- Aqua Teen Hunger Force, The Universal Re-Monster