7. Do you resort to chewing on pens when you get nervous in class or work? Well, apparently you’re not alone. While many people believe that the holes on the top of the pen caps are made to make the pen dry out faster, they’re actually there to provide an airway just in case the cap is swallowed. It is reported that around 10,000 people choke on a pen every year, so many that they actually redesigned the pen to accommodate the accident.