Annie,
I just looked at the links re: nightshade and caffeine. This would appear to explain my only two vices in life and my strong addiction to them! Before coffee as an adult I had a pepsi every morning - couldn't do without it. And I started smoking when I was 13 "took to it" with the very first smoke - with no negative reaction at all.

I guess I was self medicating myself without even knowing it, huh?