> The problem is when they have the exact opposite meaning Granted! But also when they have no meaning, or are just... odd (e.g. "That's weird, how do they wan

> The problem is when they have the exact opposite meaning Granted! But also when they have no meaning, or are just... odd (e.g. "That's weird, how do they want me to respond to that reply they just made?") White teeth are totally creepy here too. If you ask any US dentist, they'll tell you to match eye white (varies from individual to individual) to look natural. But, then, there's a few "beautiful people" states where norms are so out of whack they don't realize how weird it is.