There's a reason so many people call themselves "chocoholics." When we eat chocolate (and other sweet or fatty foods), it releases serotonin into the brain. Serotonin affects the brain cells related to mood, appetite, social behavior and even sexual desire. So, when we eat chocolate, we actually feel happier. Then, we crave that feeling when we're not eating chocolate.
In many women, these chocolate cravings actually occur on a monthly basis, suggesting a hormonal link. Many people report craving chocolate -- and that happy feeling -- during episodes of seasonal affective disorder and premenstrual syndrome. When you claim you love chocolate, you may really mean it.