Lots of men keep their wallets in one of their back pockets. Stop it! Seriously, stop storing your wallet where you can sit on it so much of the time. Most men's wallets are stuffed to the brim with plastic cards and slips of paper, making them hard to sit on. This constant pressure on the sciatic nerve -- especially on long flights and car rides -- can cause lower back and leg pain that can last long after the wallet has been removed. Guys, keep your wallet in a side pocket or jacket pocket. Your sciatic nerves will thank you.