There are certain reasons why we crave chocolate-it tastes great: it has an irresistible smell. When it melts in your tongue, it makes you feel good. As a result of all these feelings, our brain releases certain chemicals as a way of responding to our great chocolate experiences. The feel-good experience that comes with each chocolate makes the brain release some feel-good hormones like dopamine in certain areas of brain, such as hypothalamus, hippocampus and the frontal lobe. It is normal for every human to experience the release of dopamine whenever a pleasurable thing occurs like sex, watching your favorite sports star being decorated with a gold medal, laughter, etc.
We crave chocolate to have a repeat of this kind of experience, or to have that same feeling repeatedly. This is due to the fact that , an experiment that involved the separation of chocolate components showed that ingesting the components of chocolate without tasting or feeling it with the mouth and tongue never reduces the craving for chocolate.