After my teenage years, I had always, always gained weight during the Christmas time. Or whatever politically discreet 'Happy Holidays' -term you like to call that two week period. Only once, about ten years ago, my whole family suffered under rather hard vomiting disease, so even I lost about 6 pounds after the Christmas Eve. There were no problem with the food, though.
Well, the last two weeks were not different at all. I like Xmas food for sure, but my severe weakness is related with chocolate with its different variations. You just can't resist the barricade made of chocolate boxes, when entering to the store.