Fewer than three in 10 married women in Hong Kong say they are interested in sex and enjoy a satisfying sex life - compared with more than half of all husbands. The data was unveiled by the Family Planning Association, which says the results are part of the most comprehensive survey ever conducted into the sex lives of Hong Kong couples. Only 28 per cent of the 1,607 women questioned by the surveyors expressed both interest and satisfaction in their sex lives. By contrast, 52 per cent of the 1,147 husbands questioned said their sex lives met the same criteria. The survey also found that sexual satisfaction for wives went into an almost immediate and irreversible decline two years after marriage. Satisfaction also went downhill for men - but rebounded slightly after 14 years of marriage. Despite the low levels of sexual satisfaction, the survey found 84.5 per cent of men and 73 per cent of women were happy with their married lives in general. The association's executive director, Susan Fan Yun-sun, said work stress, financial pressure and living environment were the key factors that negatively affected sex lives of couples. Professor Ng Man-lun, head of the sex clinic at Queen Mary Hospital and vice-president of the Hong Kong Sex Education Association, said Chinese culture dictated that women should be passive about sex. This might contribute to their lack of pleasure in sex, he said. The survey also found Hong Kong women generally want to have fewer children. The average ideal number of children in the latest survey was just 1.6, down from 2.1 in 1987. Seventeen per cent of wives said they wanted to have only one child, while 15 per cent said they did not want any children at all. Five years ago, only 10.9 per cent said they did not want children. Similar attitudes were displayed by husbands, with 70 per cent saying they did not want to have any more children compared with 32 per cent in 1997. Professor Lam Tai-hing, chairman of the taskforce that conducted the survey, said the bad economy was partly to blame for the change in attitude, but it was not the key factor. 'This reflects the general trend as families in Hong Kong are getting smaller and smaller, starting from the 1960s and 1970s,' Professor Lam said. 'Hong Kong is a migrant city so we can't say the low birth rate will affect the population structure much.' The association said that it respected people's individual choice and would not actively promote the idea of having more children.