Parents accidentally dressed their son in an obscene Christmas sweater for his school's ugly sweater day. Oops! It was an honest mistake, one that they missed until their son's Kindergarten teacher pointed it out. It's almost as naughty as when kids make unintentionally dirty drawings of Santa.

On the plus side, this sweater finally reveals where Santa relieves himself on his trip around the world. He can't do it off the sled while traveling at supersonic speeds, and he wouldn't want to impose by using the bathroom of a house he's visiting. The sweater explains it all:

Sources: Imgur