system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Howcome i'm getting hungry after a few hours of not eating, even though my body can survive for weeks without food?

Same goes for water, i get hungry faster than thirsty, even though humans can survive 3-4 days without water but 30-40 days without food.
gpt
If you wait until the point where you are about to actually die of starvation and/or thirst, before you try to obtain more food or water, you have put yourself in a needlessly dangerous situation.  In economic terms, it would be the equivalent of deciding that until such time as your bank account is zero and your wallet is empty, there is no reason to seek employment.  Planning ahead will generally give you better results.