The weed develops a link with your brain. Brain releases certain chemicals upon smoking weed due to chemicals that come in though it. Brain likes that. Brain gets addicted. Brain [b]and body [/b]get used to that. Break it and body has a violent reaction without it because [u][b][i]IT'S DESIGNED TO ADDICT YOUR ENTIRE BODY THOUGH YOUR BRAIN[/i][/b][/u] [spoiler]You are partly correct. You entire body gets addicted, however, it starts in the brain.[/spoiler]