HIV . Hepatitis . STI Education + Resource Centre: provides information on HIV/AIDS, hepatitis, and sexually transmissible infections (STIs).

Family Planning Victoria: information on sexual health, relationships, safe sex and STIs.

Melbourne Sexual Health Centre : MSHC Online provides easy access to resources needed in a clinical setting and practical information on your sexual health.

Sexually Transmitted Diseases (USA): from the National Institutes of Health

Law stuff:  is a youth-friendly site with legal advice covering a range of topics and questions, including "when can I have sex?"