Tea

Does anyone have any idea why drinking tea should be so intensely satisfying? I mean it doesn't taste of much except for a hint of soggy leaf mould. I've been drinking it too long to remember how I started although I do recall I took sugar with it, then when sugar was in short supply my craving for it overcame my distaste for it unsweetened. After many years as a hold out, I've started to use tea bags again recently and I have to say the ones you can get today are a significant improvement over their soda laden counterparts from years ago.