What a Russian Smile Means

It's not just Russians who don't smile without reason. The French work this way too, hence what is often called 'the undertaker face'.

If you get a smile from a French person (or a Russian) it's because you have earned it.

From "French or Foe" by Polly Platt (http://www.pollyplatt.com/pages/frenchfoe.htm)

    Learn The Six Codes, including the Magic Words, for dealing with the French:
        1.      Don't smile!
        2.      Flirt!
        3.      Use the Ten Magic Words!
        4.      Add "Monsieur" or "Madame" after "bonjour," "au revoir," etc.
        5.      Shake hands!
        6.      Watch out at the door!