system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When your lips are chapped why does licking them make it worse? Why does the moisture in your saliva not help?
gpt
Licking your lips will only feel good for a little while since the saliva evaporating takes away even more moisture. On top of that, your saliva is full of digestive enzymes that make healing those chapped lips even harder.