Next time you are planning on singing cheerful praises with your church, know that Christmas caroling actually started with a bunch of drunks. 

When "Christmas" was really a celebration for the winter solstice, poor carolers would go from house to house singing and threatening to break windows if they were not given food and drink.

That's not the only Christmas tradition with an odd origin.  Santa was originally kind of a jerk. Instead of elves, he was joined by a devil creature named "Krampus" who was quite mean, especially to naughty kids - whom he kidnapped, beat up, or at the very least tortured with bad gifts.