I've been watching this for a few days, this novelty concept. It seems like what you are proposing is that it is a Survival Of Species (SOS) function. A pervasive, hardwired thing such as Food and Procreation.
Looking into it, I can see that. When questions like this come up, my first go-to scenario is cave man roots. How would novelty suit the basic human survivalist archetype? and the opposite, how would the absence be detrimental. I also see how it informs and co-exists with the other SOS functions. Novelty in food choice, creates a balanced healthy body. Novelty in sexual partners creates a more diverse genetic society and so on.
On a personal level, I noticed discontent when I was considering what I was going do for dinner last night. Looking into it, my only objection to going out to the same local pub was that I'd been there two times in the past three days already. I chuckled and checked my pockets for quarters for pinball.
It certainly seems to be a motive force, and a good one to watch when it comes to how our decisions are made. I can see how fibers of ego can attach to it.
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