Tolerance has two factors the physical one and the mental one. When youve had the same feeling day after day it can even become mundane. I may get shit for this but once in a while I get totally bored of weed. I blow it off for a week and have fun being active and enjoying the experience of not smoking. Then a week later I have a smoke session to myself and a cigarette, Ill be in such exstacy I couldn't imagine not toking, then the cycle repeats