system
Given the following post, respond as if you're commenting on Reddit:
human
eli5 why is burning calories such a slow process compared to accumulating them?
gpt
Because our bodys are meant to live for a while when no/ little new calories are available. And if there is food available, it has to be used efficiently, saved as fat for the next famine. It's not like our metabolism knows that the probability of that happening is rather slim and that the dangers of being overweight are a more pressing issue.