I read somewhere that your awake cycle is a biological thing that goes all the way back to when we were a tribal system. There are people who get up early, there are people who stay up all night, and a range in between, so that there would always be someone to metaphorically guard the fire. Me, left to my own devices, I go to bed at 3 am and get up at 10 am. This nine to five thing, it's a bit of a killer.
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