I'm really interested to see what Val's intentions are, at first she was giving me bad guy vibes, telling Yelena that Clint Barton was responsible for Natasha's death and recruiting that asshole John Walker, but since Bucky is working with them I'm not so sure, plus the whole Hawkeye thing has been sorted out.
Considering the movie probably finished before the election, I wouldn't expect anything too meta, but it could definitely have some messages about the affects of warfare.
The end of Secret Invasion sort of did that with the whole declaring war on the Skrulls thing.
In the US I think it's (conventionally) considered attractive because most people can't afford even decent dental care. So if you have good teeth it's sort of a sign of wealth, if that makes any sense.
I wanna know where you're getting your dental insurance because this is 1000% not the case for me.