system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do human teeth grow so differently and badly? Why are braces almost mandatory for so many?
gpt
They're not really mandatory or even almost mandatory. Braces are primarily a cosmetic preference that the U.S. engages in *far* more than just about any other country. Most people could easily live just fine with crooked teeth. Barring severe cases of malocclusion or impacted teeth, crookedness only really makes flossing more difficult but has no significant impacts on health.