system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do sour candy make our mouth produce so much saliva ?
gpt
The sensation of "sour" is your mouth detecting acid.

Small amounts of acid are no big deal, but very concentrated acid can cause damage to your body.

If you get some very strong acid in your mouth, your body's first response (besides making you taste something incredibly sour) is to try and dilute the acid by cranking up saliva production.

Sour candy is coated in acid, usually citric acid (the same acid that makes lemons and limes sour).