Men: where do you carry your wallet?

So this is to be the first of two questions inspired by a new pair of dress pants I just bought at the Gap Outlet for $7. I have always carried my wallet in my left, back pocket. These pants have a button closure on the right, back pocket, but none on the left. The left pocket was also stitched shut like a new blazer pocket and I had to open it up to put my wallet in. I have also noticed that some shorts with only one back pocket have it on the right. So, am I defying tradition and wearing my wallet on the wrong side? Should I try to change my 30-some year habit? If the right pocket is traditional, why?