[Coda]

Honestly, it's not unusual to wake up not-hungry at all. It's only been since the Industrial Revolution that the idea of "breakfast" as a specific meal was considered normal. It was intentionally pushed as a health measure to make sure that factory laborers got enough calories in a world of increasingly scheduled time -- you can't just say "oh, I'll eat when I'm hungry" when you're expected to be working your station from 8 to 12. For most of human history, people would get up and start working right away (gotta milk the cows!) and only eat once they'd worked up an appetite.