pot and other subtances

when I was a child I was told that alcohol, marihuana, cigarettes and other subtances where not allow, that these things will turn you into a  criminal or something like that. but now with the passing years, now that I'm a little more of a independent thinker I got another vision of these things.

I still not knowing why alcohol and cigarettes are allow in our society but marihuana and other subtance (naural subtance) are not.

Ignoring that all of these subtance should be forbidden for child under the 18 years old. but for us, adults, people who can make their own decisions should not differentiate between drugs that are allowed and not allowed.

tho I should admit, I tasted alcohol when a was younger , only for fun but I didn't turn into anything bad, in fact it doesn't affect me in school or university so a vision of alcoholic or some kind of that, would be totally wrong. I think of me as a person who didn't drink too much, like my sister who drink beer every day. I only drink with my friends when we gathered in some house of one of us.

If we start talking about marihuana I don't have much to say about it. I've spend twenty years with out tasting it, only like one week ago I tasted for the first time, I didn't feel any diferent but my friends said that it was because it was my first time and that I was drinking too.

so that my experience so far with pot and other subtances.

now what would you thing about it?