So much is written about the sexual objectification of women and girls, but what about when it happens the other way around?

A top private girls' school is in strife after a huge photo collage of sexual conquests was created, and the boys in it shamed on social media.

Staff at the Wilderness Girls school in Adelaide, South Australia knew about the collage, which was in the Year 12 common room but thought it was "innocent and respectful''.

According to The Advertiser, that changed when the girls published the boys' photos to social media with the hashtag #quantitynotquality.

The school took action this week and the girls were told to take the images down.

Image: Supplied.

One private school boy told The Advertiser that the school knew about the photos and didn't care because it was "girls doing it to boys''.

He said some of the boys had been made fun of on Instagram and Facebook throughout the year. He said appearances had been mocked and sexual encounters described on the "wall of boys''.

The girls treat it as a joke

“It’s embarrassing to have that showed about you, what you’ve done in your private life,” the boy said.

“It’s frustrating how the girls treat it as a joke but, if a guy did, it would be objectifying women and promoting rape culture.

“I find it unfair that boys can be shamed in this way.”

Wilderness principal Jane Danvers said the photo display was allowed to remain for most of the year because staff had deemed it “innocent and acceptable”.

The images were considered respectful because they were mainly portrait shots from Facebook

“The images were considered entirely respectful as they were portrait shots sourced mainly from the boys’ Facebook profile images or photos from the school formal. The context in which they were placed on the common room wall was deemed by staff as innocent and acceptable – girls displaying photographs of boys who were friends and boyfriends.

She told The Advertiser the school was taking the girls' behaviour seriously.

"Unauthorised and inappropriate''

“The photographs later featured in an unauthorised and inappropriate Year 12 end-of-school-year slideshow presentation two weeks ago. The photographs in the Year 12 common room were then removed at the instruction of senior staff,'' she said.

“The slide show presentation was (on Tuesday) posted on social media and was drawn to our attention (on Wednesday).

“Steps immediately were taken to have it removed and Wilderness School does not tolerate such behaviour. The matter is being investigated and those involved will be dealt with appropriately.

“We take it incredibly seriously. It goes against everything we believe in as a school,” she said.