Starving for 3-4 days will make your brain prior other stuff… I think basically our brain is made to always strive for the better, so if you got good access to food and shelter, you will start worrying about other stuff…
If you take away something that got high priority, like food, it will reset your thinking patterns.
For example, after 8 months of boot camp, sleeping outside in the middle of the winter with bad access to food.
I’ve never been so happy like I was after those 8 month intensive military training.
Just sleeping in a real bed and be able to sleep as long as I wanted was so totally awesome!
It lasted for about two years.
Now I only get that happy if I eat luxury food and buying expensive hi-fi equipment 