system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is holding your pee (which is considered bad) any different from when you're sleeping and your body does that for you?
gpt
Your body doesn't (typically) hold your urine to dangerous levels while you're asleep automatically.  That's why you wake up needing to pee.  Or some people piss themselves.  Holding your urine an excessively long time isn't comparable to going to sleep.  It's comparable to waking up when you need to pee, then holding it for several hours after that.