Joke or in-joke?
My littlebig brother has just blogged about christmas.
Well, not exactly about christmas. Rather about explaining christmas to his missus, who grew up in a culture that doesn’t have it. And what he explained wasn’t christmas in general, but christmas day in our family. Even more particular than that, the circumstances as he describes them can’t've existed in full for more than a couple of years, though much of what he describes is perennial.
As ever, his narrative is superb, and in this instance it’s also very funny: I can’t recollect when I last laughed that much! But a moment’s reflection leads me to wonder: is it objectively that funny, or is it also (or even just) because what he describes is, like an in-joke, something he and I know all about, but the outside world can only infer?
 He’s the youngest of the family, but also the tallest.