Is it an irresistible urge to behave in a certain way? A conscious wish? Is hatching an egg a desire or a compulsion? Is motherhood desired or is the desire a compulsion that cannot be mitigated easily.
Is the act of eating a response to the presence of food or the presence of hunger? What if you had to rely on someone else to feed you? Do you live in a culture based on the endless celebration of consumption? Do you need to keep consuming?