Moscow - Surrounded by erotic toys, half a dozen women of all ages sit in a central Moscow basement facing a whiteboard as a sex coach trains them in speaking openly about their sexual desires.
"I finally want to know what it's like to be a satisfied woman, what sexual pleasure is," one of the "students", aged 45 and divorced, told AFP.
Barely spoken about publicly in Soviet times and with the Kremlin pushing conservative values in recent years, sex, as a subject, remains largely an unmentionable in Russia.
To help people overcome their shyness in talking about sexual pleasure, sexologist training courses, psychologists and so-called sex coaches are now appearing in Moscow, adding to TV shows and articles
in women's magazines.
Viktoria Ekaterina Frank, a psychologist and sexologist, said that her course at the Sex.rf school did not aim to teach sex techniques but rather "help women understand the psychological barriers engrained in their heads".
Many women are "so embarrassed to talk about sex, they can barely breathe", she said.
Nearly three decades after the end of the USSR, Russian society remains deeply marked by the aura of taboo around the issue of sex in the Soviet Union, according to sociologists.
Soviet authorities primarily promoted the idea that "the sexual act should serve only for reproduction," sociologist Yelena Kochkina told AFP.
"This means that sexuality was not talked about in the family or at school," she said.
A TV interview from the beginning of the Perestroika era immortalised the Soviet prudish and practical attitude to sex, even if it was far from true in practice.
During a 1986 talk show broadcast in the United States and the USSR, an American woman asked a Soviet woman if there was sex in adverts in the Soviet Union.
"There is no sex back home, we are categorically against it," the Russian replied, in an exchange that has become a part of popular culture.
Although it was off limits in public discourse in the Soviet era, everyone was having sex and "maybe even too much", said Dmitry Rogozin, a sociology professor at the Russian Academy of Sciences.
Abortion at the time was often used as contraception due to the pill and condoms being unavailable and, as a result, the number of terminations was one of the highest in the world at the beginning of the 1990s.
When the USSR collapsed in 1991, a sex industry burst on to the scene, with a wave of erotic films on video cassette or in cinemas, magazines with racy photos and adverts in the popular press.
Sex coach Yelena Rydkina said that after the initial "crazy boom in interest", suddenly it became too much, causing fear and rejection, and people turned away.
Nevertheless, there is now a "real demand" for more coverage of sex-related issues, leading to a rise in sex blogging in Russia, added Rydkina.
One such blogger is Tatyana Dmitriyeva, who founded Sexprosvet, a popular website that aims to "develop sex culture in Russia".
"I wanted to change that, I wanted to start a dialogue," she told AFP.
Dmitriyeva also organises burlesque shows and regular pop-up markets of erotic accessories in Moscow, all as part of efforts, she said, to promote "sex that is not boring".