" The release of dopamine is a form of information, a message that tells the organism “Do that again.” Dopamine produces the sensation of pleasure that accompanies mastering a task or accomplishing a goal, which makes the organism want to repeat the behavior, whether it is pressing a bar, pecking a key, or pulling a slot machine lever. You get a hit (a reinforcement) and your brain gets a hit of dopamine. Behavior—Reinforcement—Behavior. Repeat sequence. "

― Michael Shermer , The Believing Brain: From Ghosts and Gods to Politics and Conspiracies How We Construct Beliefs and Reinforce Them as Truths