Hong Kong should adopt an international declaration to protect sexual practices of minorities, including homosexuals, transsexuals and polygamous families, leading sexologists said yesterday. The Declaration of Sexual Rights, outlining rights to freedom, autonomy, privacy, equity and pleasure of sex, was endorsed by the World Association of Sexology in its 14th world congress, held in Hong Kong, the first on Chinese soil. Speaking at the end of the five-day conference attended by 600 participants from around 50 countries, association president Professor Eli Coleman said the declaration was important in defining sexual rights. 'Sexual rights are basic human rights, they should also be enacted in health policies,' he said. Professor Coleman said the association had planned to ask countries to report their sex rights situation every two years. The association, which states 'good sex is important to the quality of life', will also promote the declaration to the United Nations. Sexologists earlier protested against female genital mutilation in Egypt and a ban on oral contraceptive pills in Japan. Mainland China is not yet a member of the association. Ng Man-lun, professor of psychiatry at the University of Hong Kong, said he would promote the declaration to lawmakers and government departments. Professor Ng, known as Hong Kong's 'Dr Sex', said lack of sex education in schools deprived students of knowledge. 'There are many other violations of sexual rights here. For example, why is the age for having lawful sex between homosexual people set at 21 instead of 16 like other people?' he asked. 'Why are transsexuals not allowed to get married? And why does our marriage system only allow monogamy?' He said only a few countries, including Germany and the Netherlands, had recognised legal marriage of transsexuals. 'We need more debate in society. Respecting people's sexual rights does not mean that they will be more promiscuous,' Professor Ng said.