system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is staying up later than normal so much easier than going to sleep earlier than normal?
gpt
Your body has a natural autonomous process that makes you more sleepy the longer you stay awake. You can resist this process (stay up late), but you cannot consciously force the process to happen more quickly (go to sleep early). There are ways to help induce this process but, short of burning energy throughout the day (such as through exercise), it generally requires external help (through chemicals of some form such as melatonin supplements).