eli5: why is it so difficult to go a week without eating when we have 10s of thousands of calories worth of body fat?

Question

eli5: why is it so difficult to go a week without eating when we have 10s of thousands of calories worth of body fat?

In: 89

Answer 1

For largely the same reasons why your common sense (hopefully) tells you to keep going to your job every day even though you (hopefully) have money in your bank account.

You don’t want to use up your reserves unless you absolutely have to do so.