Wellington College's headmaster has condemned his students' sexist comments as "deplorable" - and urged all parents to talk to their sons about what consent means.
Headmaster Roger Moses has been confronted with public scorn after Facebook posts by students.
One of the young men had written in a closed Facebook group: "If you don't take advantage of a drunk girl, you're not a true WC boy."
Mr Moses took to Facebook himself to announce an investigation into the incident on Wednesday. He also convened a special assembly for year 11, 12 and 13 boys to discuss "issues arising from this incident".
The students involved in the sexist comments had been identified and the senior leadership team had started an investigation.
"The comments made about young women in those posts were deplorable and appalling and do not reflect Wellington College values in any way," he said.
"I would urge you to take the time to talk to your son/s about the meaning of consent and respect and about the risks they take posting comments on social media."
He says the school is working with Rape Crisis and other agencies to make sure students understand the meaning of consent and the importance of respect in relationships.
"The boys have been given a clear message that part of being a good man is respecting women."
Mr Moses also suggested parents talk to their sons about social media use.
"The incident also reminds us all that whatever we say on social media is there for all to see and for each of us to be judged by."