I think I may have pine mouth. I just ate some corn flakes with unsweetened soymilk and the back of my tongue felt like it was burning. And, of course, the corn flakes tasted particularly bad. I wonder why it didn't affect me last week. Maybe cooking it and then putting it in the frig results in some chemical effect? I may just have to cut out pine nuts from my diet all together -- maybe sunflower seeds instead?