I am one of those people (and, also, coincidentally, typing this at 3:07 AM local time). There was a period of time in which I was forced by circumstances to g

I am one of those people (and, also, coincidentally, typing this at 3:07 AM local time). There was a period of time in which I was forced by circumstances to go to bed every night at 10 PM (by which, I mean lights out, in bed, ready to fall asleep), and wake up at 6 AM. I did not like it, but, eventually my body adapted to it to the point where when 10 PM rolled around, I would be tired, and automatically wake up at 6 AM. This all went straight to hell when I ended up working a very long shift one day that extended well past my 10 AM working time. From then on, I was going to sleep more like 12-1AM and waking up at 9-10 AM.