I'm afraid I'm going to be very bad. I'll post one of my own stories. It's called "The Joys of Christmas" and it's very short. I'm sure it's not the done thing, but any other idea eludes me at the time, I couldn't find a Christmassy story to post, so here goes...
http://archiveofourown.org/works/318674
http://archiveofourown.org/works/318674