You know, sometimes the weirdest situations can inspire some good mental exercise. Like just now, when I was sick of studying, had had a meal at Macs, and was walking back in the cold¹, I actually started reflecting on the past year. On how I'm like as a person. How people might perceive me. And the like.
Perhaps the firing of random neurons is one of the ways our body creates warmth and maintains normal body temperature - mental exercise may just be as efficient as the mild physical exertions² you do when you're cold.
I mean seriously, we all know when our mind is focused on something, we tend to forget the various stimuli around us right?
Don't you think this is a reasonable extension of that common phenomenon? The physical and apparent manifestation of but yet another homeostatic mechanism in our iniquitously complicated bodies?
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¹With cup of cold Coke in my hand. Which definitely didn't help the circulation in my hands.
²Like shivering, lah.