Wardrobe emergency! A study found that thousands of men in the U.S. go to the emergency room every year because of accidents involving their zippers (ouch!). In fact, zippers are the cause of the most crotch-related injuries in adult men reporting to ERs. You laugh now, but zipper injuries are no joke (especially if it happens to you). Doctors say that infection is a common risk, and in some rare cases, surgery is required. This is a pretty good argument against going commando.