system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can I go from morning to night, and my mouth tastes fine, but after only a few hours of sleep, it tastes like a bum's nutsack?
gpt
During the day you open your mouth, eat, speak, and do many other things that change the contents of your mouth.  Not in sleep.  
  
What's more important though, is how you know what a bum's nutsack tastes like.