Losing your password isn't funny. Well, it's not funny to you. To the rest of us, it can be hilarious. The sort of point-and-laugh hilarity that comes from losing access to a dating site right when you find the perfect girl. Comic artists have taken the pain, monotony, and humiliation of dealing with passwords and created something we can all agree on. Your passwords suck.
We've already seen the greatest comic about passwords from XKCD. These comics can also be used as teaching tools. Okay, that's a stretch. Just enjoy the hilarity.