Does each “buzz” give a different effect? How does the brain know which part to let the serotonin into to get a specific high? Like is there the same “buzz” between lets say alcohol, coke, heroin, gambling, cigarettes, weed or painkillers? How does your brain know how to let loose the “high” part? How does a alcoholic different from a alcoholic or gambling addict? Is there like a thin line that runs through all addictions? And this is why so many fall under the very vague umbrella of just addicts?? Can explain more if need be.