Most of us feel we make it through each day as upstanding citizens. Picking up our trash, holding the door, and saying “hello” on the street are markers of a polite person. However, a playback reel could reveal something surprising and, to some, horrifying: We’re all rude! That’s right — we can be impolite sometimes, even when trying our best not to be. Whether due to excitement, distraction, or frustration, sometimes our best efforts slip and give way to less-than-impressive behavior. Do your good manners go out the window in these daily situations? Etiquette plays a significant role in building...