system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does it feel like we only sleep for like 5 minutes when in reality it's more like 8 hours?
gpt
I think this is because parts of the brain involved in short-term memory and consciousness are inactive.  When you sleep you sort of forget that you exist.  If you are not conscious then you are unable to sense the passage of time.