tedskelmont asked: So, what's the deal with Christmas and popcorn?
Popcorn as a Christmas tree decoration was popular in the days before colored lights, because it was an inexpensive, readily available product, which, especially if dyed before being strung up, could provide a very colorful contrast to the dark needles of the tree. Additionally, edible decorations, such as popcorn, nuts, apples, cranberries, and so on, were especially popular in the early days when Christmas trees were kept outside (and still alive), because these decorations could help feed birds who would otherwise have trouble finding food in the winter months.
Popcorn tins as presents seem to have begun, as far as I can tell, in the 1950s, when people started spending more money on gifts for people who were not in their immediate family. A three-gallon tin full of popcorn is relatively inexpensive and doesn’t require a lot of thinking if you don’t know the person you’re giving it to very well. I mean, most people will like at least one of the three kinds of popcorn in there, probably? That seems to be the hope.
If you mean some other popcorn-related Christmas tradition, I’m afraid I am stumped.