Many moons ago, I heard this idea about Russia, and why they had so many attractive women.
It was posited that due to their substantial wartime losses from WW2, there were far more women than men in the populace, so any dude could snag a hottie. And then they had progeny that also grew up to be hotties, creating a higher density of hot people.
I don't know if this is real, but I think it's interesting to think about.