> You can, and should, speak Russian with a permanent broad smile
Funnily enough, I was told the exact same thing about English when I was learning it as a Russian native.
In contrast, see “Why Russians never smile”: https://news.ycombinator.com/item?id=27317859
Are we trying to make psychopaths? That’s sounds very unsettling for conversation.
I learned it on my own... always imagined it as "speaking without letting the heat out"