Not just in Russia. I found this article quite enlightening: https://www.theatlantic.com/science/archive/2016/05/culture-and-smiling/483827/ https://www.theatl

Not just in Russia. I found this article quite enlightening: https://www.theatlantic.com/science/archive/2016/05/culture-and-smiling/483827/ https://www.theatlantic.com/science/archive/2016/05/culture-...