While I am nostalgic for the hash I'm not smoking, I now realise that what I am craving is the tobacco.

I have never smoked an unspiked cigarette in my life, and don't intend to start now.

I'm not nostalgic for the paranoia; it's the idea of being stoned I miss.  I miss not feeling responsible for my own thoughts.  In fact, I am nostalgic for feeling irresponsible.