Oh I dont disagree with you. I was using coffee as stand in for caffeine but I feel that coffee is the most common form of caffeine intake people have. So it felt ok to use as stand in for caffeine. I think "caffeine" is SUCH a common drug that people use as simple stimulant to get through their days that to me it feels like an essential good. Like as soon as you took care of the barest essentials some form of caffein beverage would be next on my list of wants.