I second reggie's suggestion. I'm right handed, and my wife is left handed. She got the first computer we owned, and insisted on having the mouse on the left side. I learned to use it very quickly, and I'm really glad.
I find left hand mousing frees up my right hand for writing things down, and there's room on the right side of the desk for something to write on.
I predict that you'll never want to go back to right hand mousing once you learn to do it with your left hand.
The law of gravity is fine, but the minimum sentencing guidelines are much too harsh.