There is a theory that if you crave sweets, you may have lacked a bit of sweetness in your childhood. Maybe you didn't hear enough words of encouragement or were properly cared for with love and affection when things were tough. The theory goes that the way some self-soothe and fill that void is with sweets or alcohol, etc. The way to end the cycle of needing sugar is to be more sweet to yourself, with self-talk and self-care.