You've been brainwashed. Congratulations.
I did that crap for years, and it hurt my family tremendously. Now I see my younger brother going down that same road, and it hurts me tremendously.
I wish I had had a wake up call or been deterred early on. It should not be legal; many guys I know, and friends, back then the focus of life was just getting high whenever there was a chance and many are still there. Making it easy to buy just makes more kids buy it. Don't Make it easier!