I had a bizarre experience with smoking magic juju. When I was about 15 I began by smoking only about 3 times in 2 years or so, and each time I was tweaking into ulternate dimensions, getting what seems now unnatural hallucinations, I know the stuff was just pot though because I smoked with a bundle of people who hardly felt any effects what so ever. These were great experiences by the way.
So anyway, after those two years I started delving more intensly into the pot. I went about a full year smoking everyday, getting hugh as a little criddling crudler. At one point I was on some heavy painkillers after some surgery and that really flew me off my rocker, I one day came into realization in my basement kicking my legs chanting "lallalala" and I don't know why, so don't ask me.
So anyway, about a month after these particular experiences, and tons of self realization, I am a completely different person now suffice it to say, I stopped becoming high. Pretty much just flat line, tried smoking like 4 times during one day and just feinding with no particular reason.
So I stopped smoking for about 2 years, because there wasn't any point. Just got into a relationship and had some experiences with writing which I picked up during my transformation.
Then after those two years I began smoking again, but much less frequently, though more frequent than in the beginning. I probably smoked on average about 2 times a week and it made me high as a kit and cuboodler to say the least.
Hope this helps you a little!