system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do people enjoy carbonated drinks, but dislike them when have gone flat?
gpt
Carbonation makes the drink acidic by producing carbonic acid, so sodas are usually extra-sweet to counter that. But after the drink has gone flat, it has all the sweetness with none of the acidic tang, which doesn't taste as good.