This. It's also why we eat too much sugar. When we were cavemen it was a hard to get luxury (if you weren't in an area with decent fruit, your only supply was honey - and you had to fight the bees to get it).
Now, it's all too easily available, but we're still genetically programmed to go for it like it's a rarity.
Never thought of it like that.
The only times I really get cravings is when I've given up bread (like right now!), but that's psychological, as in I only want it because I can't have it.
And when I'm hungover I desperatley crave Cola or Orange Juice. I'm guessing to do with the sugar.
Isnt a hangover something to do with lack of salt in the body? Along with dehydration.