School sex gangs in Australia

Six-year-old perverts:

Three boys aged six ran a sex club at a Brisbane state school demanding and receiving sexual favours from Year 2 classmates, a father has claimed. . . .
His revelations came as uproar was sparked by yesterday's Courier-Mail story, which told how the sexual assault of a seven-year-old girl by a young classmate was dismissed as a "childhood experiment" by a country school principal.
The Courier-Mail revealed how the young victim was forced to perform oral sex on the boy, who had threatened her with violence.

Where does a seven-year-old even get any idea of what oral sex is? Who are these kids? And where are their parents?