>>13633372Your brain is a Skinnerian device. It's objective is to ensure your survival and proliferate. Thus it rewards you for accomplishing those task -- your base desire are so because your brain rings the dinner bell. Your human cognition is designed to navigate a dynamic environment, and you do as much to complete your objective of fulfilling you base urges.
You are build to eat, drink, sleep and fuck. Everything else to that is ancillary in nature -- pure human hubris.