It's not really seasonally appropriate — more of an Easter thing than a Christmastime one — but I was talking with one of my civilian (i.e., non-medievalist) friends about her plans to put some oddly anthropomorphized marshmallows in the microwave, armed with tiny toothpicks to see which can overtake the other when the heat causes them to inflate and expand: Peeps jousting. And I started doodling while we were talking, a picture of two classic bird-shaped marshmallow Peeps approaching a movie-franchise Minion Peep, all brandishing their toothpick lances. I drew it on whatever happened to be on my desk while we were talking, and what happened to be on my desk was an essay on medieval war poetry.
It's not a totally idle or solipsistic exercise — reproducing pages, documents, texts or drawing parallels with modern modes of production is not evidence but can offer some insight into medieval modes of production or at least, in this case, serve as a caution against the dangers of over-interpreting. (I have colleagues who work on paleography who practice calligraphy in their spare time and are grateful for the insights it provides them in their professional lives, for example.)
Or it's pointless and just some doodles on a page. Which is kind of the (circular) point.