My personal view is it’s an evolutionary feature to help get thru the day when the day is boring. We are here bc ancestors figured out a lot of helpful traits that help manage other traits. We have a trait to find new and interesting thibgs to do or watch out for. But when there’s something like walking a long distance or other important but safe and familiar routine, our brain distracts us enough to just focus on one step in front of the next. But there are lots of moving parts so sometimes these traits pop up when we feel they are not helpful. So we have another trait of curiosity and sociability to seek answers to things like ‘why do i have a song stuck in my head.’ And then maybe we find clarity that helps us in other downstream ways.
It all runs pretty smoothly most of the time, all things considered.
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