Sex education can be called sexuality education. It requires a long time for a person to form attitudes, beliefs and values about identity and relationship. Sex education includes many different aspects, for instance, birth control methods and family planning. Children should be taught in school to develop knowledge about all aspects of sexuality for future needs (Kearney, 2008). To execute it at school, the Hong Kong government had cooperated with many associations to promote sex education for citizens. School is one of the way to promote sex education to youngsters. With reference to the voluntary agency Mother’s Choice, in the first 11 months of the 2008-09 year, 207 cases of unwed pregnant women seeking assistance, with more than 30% of these cases involving underage girls below 17, some of who even had several abortions (Press Release, 2009). Undoubtedly, this statistic exhibited that schools have an important role in providing young people with information about reproduction and sexuality. Evidently, sex education is already excluded in the school curricula of pre-primary, primary and secondary school. For example, lessons are provided to teach children how to protect themselves in pre-primary school. Also, there are subjects in school like Integrated Humanities, Biology and Liberal Studies, which mentioned some elements of sex education. This can show that Hong Kong government is promoting sex education for children through their education paths. The support from parents can change the mind of children about sex. Children often receive false information about sex from peers. Youngsters will changes in their cognitive mind when they are primary six and parents are needed to guide them to have a correct ethics on sex (David J. Landry, Susheela Singh & Jacqueline E. Darroch, 2000). Therefore, the Hong Kong Education Bureau encourages the Committee on Home-School Co-operation. For instance, the Social Welfare Department organiz