system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do I get sleepy after reading 2 hours or studying but my scumbag brain can play Skyrim all night without getting tired?

Why do I get tired after I have been reading for a while and my eyelids get heavy while I can pull an all nighter playing videogames and not be slightly tired until I stop playing? Neuropsychologists of Reddit, help!
gpt
dopamine / Adrenaline stuff doesn't sit well with me, it doesn't really play a role in WHY you feel sleepy. 2 Hours of studying requires extensive use of the brain centers which releases a host of different kinds of neurotransmitters that stimulate long term potentiation. Skyrim on the otherhand, does not really utilize the brain at all that much. All you are doing in skyrim is the same old practiced routines over and over again. Probably the first couple times of playing skyrim, you had trouble playing for 5 hours a day, until you practiced it enough to be easy. It's kind of like a baby walking. First couple of times, only 2 minutes a day. Now, you can walk for hours. Same stuff, just practiced until you aren't really thinking anymore.