Beauty is in the eye of the beholder. By that logic, so is ugliness.
And every year on December 15th, people do their best to look ugly by wearing the ugliest sweaters they can find. It is the most important December tradition.
Some of you may not find these sweaters ugly, but don't worry. Someone else does and that's what's important. Besides I'm sure there is an ugly sweater out there for you, too.