A group advocating sex education is drawing attention to the sexual lifestyle of young Australians and the youth's awareness of safe sex practices, warning that ignorance could make the young Aussies vulnerable to HIV/AIDS.

Alischa Ross, the founder of Youth Empowerment Against HIV AIDS (YEAH), says her organization goes to public events attended by the youth such as music festivals and take these events as opportunities to educate young people about safe sex.

Ross tells the media that people are being complacent about HIV/AIDS with some even thinking that the sex infection is not a threat anymore.

"People don't even think HIV still happens in Australia anymore," says Ross, adding that sex education should be updated in schools.

ABC News says 30 per cent of people have had sex by the age of 16, and the figure increases to 50 per cent for 18-year-olds in Australia.

ABC also reported there has been a 20 per cent increase in the rate of infection among young people in the last three years, with chlamydia and gonorrhoea among the most common cases.

Ross says the statistics imply a more risky sex behaviour among the youth.

While Ross admits HIV is not a huge problem in Australia, she warns it will become a bigger issue in the near future considering the pattern in the sex lifestyle of young Aussies today and the history behind the spread of AIDS across the world.

However, some experts think the group YEAH is being an "alarmist" in raising AIDS/HIV warning.

La Trobe University sexual health professor Anne Mitchell says she commends YEAH for raising the awareness of the risks of unprotected sex, but she thinks the warnings against the spread of AIDS is "probably a little bit alarmist."

"We do find that young people are very knowledgeable about HIV, we've been testing their knowledge on HIV for the past 15 years and their knowledge of HIV has stayed consistently high, whereas their knowledge of other STIs, particularly those they're more exposed to, isn't as good," Mitchell told ABC.

However, Mitchell agrees with YEAH that the national curriculum has to address sexual health.

ABC reports the board appointed to work on Australia's national schools' curriculum has only just started considering the part of the curriculum that will cover sex education.