Ever since? Animals are attracted to what tastes good because they need it.
That's how the sense of taste evolved. It's also the reason why we can discard the latest trend of demonizing sugar per se without even knowing of Peat, because we have such a delicate taste for sugars.
I just find it odd to think of humans eating eggshells because it's such an unpleasant experience.
Maybe they taste good if you are really calcium deficient, who knows...
its more like stuff tastes good when we need it
force urself to drink 5l of water a day ... it will taste like crap
dont drink water for 2 days and then drink it again ... it will taste like heaven on earth
Edit: I just realized thats exactly what u wrote xD