Yall people call him a doofus? He's asking logical questions. lol.. well, at least to me.
But listen, if you don't know EXACTLY what you are smoking and what it's doing to you, don't smoke it.
Weed isn't addictive to me, so I smoke it.
And if anyone tells you it isn't, it's cause they aren't addicted.
You MIGHT get mentally addicted but people would argue that there isn't such thing AND marijuana is not physically addictive like alcohol and ciggs(to name 2).

and to anyone that thinks that they should legalize EVERY drug?. lol.. that would NOT be a good idea and will NEVER happen. there are way too many EXTREMELY dangerous drugs legal right now and cocaine, meth or heroin should NOT be added to the "legal" list.. lol

and dont get it twisted, I'm all for weed getting legalized for obvious reasons.