Basically, I'm pretty wary of the adverse effects of drugs and becoming dependent on them. I've never done any, including drinking etc. But I'm curious about edibles, since it seems like there's barely any downsides, besides the risk of the edible itself being too potent(?).
Yeah some people really do have a natural tolerance. Just like with booze it depends on how your metabolism and how your neurochemistry responds. Also the first few times you take THC it doesn't seem to have that big of an effect. The first time I smoke I crushed a full bowl and barely felt it, now one bowl is normally all I take in a day unless I'm actually trying to get stoned.