I am left handed. No one knows why a person becomes such. The thing about being left handed is when you meet someone else that is a "lefty," you automatically have a special bond. It's like you belong in some secret club. Many lefties feel superior to those who use their right hand. I once had a substitute teacher tell me that "one day all of the lefties would take over the world."
Blake sent me a link to buy a "Choose the Left" ring. I thought it was pretty clever.