“Although that idea is common in popular science writing, it has long been out of date within the scientific community. As a matter of fact, dopamine release doesn’t correspond very well with the experience of pleasure. Experiments have shown that animals appear to experience pleasure without dopamine, and studies in humans back this up. Pleasure is more related to a class of chemicals called endorphins that are often released in the striatum simultaneously with dopamine, although these are probably only one component of the experience of pleasure. Dopamine is the “learning chemical” rather than the “pleasure chemical.”