I prefer staying up late, really late, like 3am. But along with the shorter sleep comes late night eating and probably a less efficient body function overall.

So -- if you're sitting down, you are better off going all the way to sleep?? That is definitely not intuitive! Or is that only for extending the 'full night' of sleep?

I suppose if you are sitting and awake, you can still eat food, whereas when you're asleep you are probably not eating.