Houellebecq's Annihilation is also a good example of this. It starts out a political technothriller, certain threads are worked through towards a resolution, but then the protagonist is diagnosed with terminal cancer and the book's tone changes entirely. The resolution of those technothriller elements is alluded to, but you actively have to fill in the blanks for yourself. I thought that it was very cleverly handled.
does one-time mean he did it once, or it was his profession once upon a time, if he did it once having done the equivalent of porn summer stock hardly seems worth mentioning.
OK it sounds like the kind of thing I was thinking would happen, if you know these kinds of people. I mean, the wife suggested that he get naked on camera to "counteract his gloom" and then the creative differences over the art of the porn.
Well, an arguably famous writer (with a mix of philosophy and politics), well-known in France for his positions who suddenly foes porn in a Dutch movie is not exactly usual.
Whether it is worth mentioning is a matter of preference, it certainly adds colors to the character.