Studies have shown that chocolate is the single most craved food in the world. Chocolate is so appealing because of its flavour and creaminess -- a perfect balance between sweetness and bitterness.
Strict dieting or food deprivation can intensify cravings and may lead to 'binge' eating. That is why many nutritionists recommend satisfying one's craving by ensuring that a little of the desired food is included in the diet.
Experts are actively conducting research to determine other causes of cravings. Recent research has focused on chemicals in the brain, called neurotransmitters, which might affect one's mood and desire for different types of foods.
Perhaps the most important factor is that people simply like the taste of chocolate. So, while scientists search for complex technical reasons for chocolate cravings, the answer may be a simple one: chocolate just happens to taste good.