hey you know what, I'm 19 and ive been smoking since 17, and BOY do i have a paper for you, i hand wrote it last year about marijuana.
I learned that cannabinoids are beneficial in small amounts (few times a month) and provide therapeutical relaxation, etc...aka being high every now and then is like a nice glass of wine. However, continual and daily use can shrink your hippocampus ( some studies in 20+ year stoners up to 32% ) AND it REDUCES THE TESTOSTERONE that males produce!!!
Effects of marijuana on testosterone in male subje... [J Theor Biol. 1983] - PubMed result
I used all my citations from this website and other official organizations, if you want i can send you the paper
end of story marijuana is criminalized by tobacco companies because of the ease it is to grow mj in relation to tobacco. if it were legalized they THINK bye bye tobacco, but look at amsterdam. anyways... you should stop, its so much money and the tolerance is built up after (yeah 4-6 months) so it doesn't even become fun.
I bought an eighth a few weeks ago and threw it in my freezer if i ever want to get super stoned every other month or so... freezing is miraculous with D9THC it'll remain potent for years as long as its out of UV and heat.
like radiohead said, it will improve your life when you get out of the ditch, when you can go to bed without having to smoke, when you can go to the movies without having to smoke, when you can go to parties without having to be stoned, its like living again man.