Psychiatrist: Mariwana works on these things called anunda mid receptors. Once you have a habit formed, the primary neuro transmitter is no longer dopamine and its canabanoids. The first time i play a video game, it's a lot of fun. Then i want to play again,. And each time i get less dopein, less dope, less dopemeat. You do that ten times, 20 times, 30 times their brain becomes habituated to it; then they stop having fun.