About craving sweets
So craving sweets is just a function of evolution. Your body needs to function. You, me, everyone else, evolved from a species of hunter-gatherers. That means our ancestors tended to eat fruits, vegetables, berries, grains and only occasionally, meats.
And they ate a ton of them – enough to produce two pound stools. That means every time they “used the bathroom”, so to speak, they left a two pound dump behind them.
So there was a ton of eating, and a ton of “clearing out” after eating, and not much in the way of calories in any of it. Grains and berries are nice, but you have to eat a lot of it to be sated.
Meat is great, but for our ancestors – hunting with flint and or wooden weapons – meat wasn’t always on the menu. Maybe you just didn’t feel like hunting the wooly mammoth today, you know?