I agree with Ron Nasty. There is a very large portion of substances that do harm. It's just different for some reason. I mean, heroin for example is something you really can't compare with something like sugar or salt. When you put a bit of sugar in your tea, every day, it's not like your body is screaming ''OMYGOD I WANT MORE! MORE SUGAR. ALL DAY LONG HELL YEAH THAT'S RIGHT'', but when you shoot heroin, your body does just that. And your body will be destroyed. Now, heroin is a completely different drug than weed.
I guess what I'm trying ...