We eat food everyday. And you can't live without taking food . We eat food because we can't live without having food. But I don't think that people eat food only to maintain their lives. Eating is important in your subjective experiences, self-sense, and your physical experiences.
Many people say that eating is nothing but instinct.
But I think it is meaningful to analyze the meaning and the discourse of eating because it is influenced by the culture and the society. It is true that human beings can't exist without taking any nutrition, and the meaning of eating food has a lot of physiological elements, but it is also influenced deeply by the cultural environment where you live. When you eat food, you think many things, you have various feelings. And sometimes you are affected by the person with whom you have a meal and sometimes you are influenced by the culture and society. It is obvious that good scent or taste make people want food.