I do not know why but there is something about drinks we use for energy such as tea and coffee that are just made that much more delicious and energizing with a dash of sugar. Of course it is sweet which is something our flavor buds are always happy about but I think the reaction it causes in our brains is why we desire it. It teams up with caffeine to give you a jolt of attention and happiness that instantly will make you more attentive and bring your day to a new level.