"Hot cockles" was a popular game at Christmas in medieval times. It was a game in which the other players took turns striking the blindfolded player, who had to guess the name of the person delivering each blow. "Hot cockles" was still a Christmas pastime until the Victorian era.
As my three year old might say, 'that's weird!'
As for a little holiday humor, that is if the phrase 'hot cockles' isn't funny enough:
What do you call the fear of getting stuck in a chimney?
hee hee ha ha ho ho ho...