Hm. Does this thing with the tongue have anything to do with allergies? Because that means I am allergic to one of the most delicious dish for me - mashed eggplant. Every time I eat it my tongue starts to hurt but I love it so much that I can't possibly quit it. There are other things that make my tongue hurt as well but I can't remember them right now.
It could have something to do with allergies.
I know that babies usually have allergy to strawberries or other kinds of berries and mothers are not advised to give them such kind of fruit until they grow up. I also know little kids that are allergic to chocolate.
But I guess food allergies are common to little children all over the world and it's something they grow out of eventually.
But this whole idea that Bulgarians don't have allergies sounds really nice. :)