Remember the mammoths, say the clean-cut organisers at the youth camp's mass wedding. "They became extinct because they did not have enough sex. That must not happen to Russia".

Obediently, couples move to a special section of dormitory tents arranged in a heart-shape and called the Love Oasis, where they can start procreating for the motherland.

Attempting to raise Russia's dismally low birthrate even by eccentric-seeming means might be understandable. Certainly, the country's demographic outlook is dire. The hard-drinking, hardsmoking and disease-ridden population is set to plunge by a million a year in the next decade.

Just as the Nazis in 1930s rewrote Germany's history, the Putin Kremlin is rewriting Russia's. It has rehaabilitated Stalin, the greatest massmurderer of the 20th century.

Bizarrely, young women are encouraged to hand in thongs and other skimpy underwear - supposedly a cause of sterility - and given more wholesome and substantial undergarments.