Leaked videos of staff from Australia's conservative government performing sex acts in parliament, including one man masturbating over a female MP's desk, left Scott Morrison's administration facing yet another major scandal Tuesday.

The prime minister -- already under pressure for his handling of sexual assault allegations including that a female government adviser was raped by a colleague -- called the behaviour "disgraceful" and "absolutely shameful".

Allegations of sexual misconduct have sparked nationwide mass protests
Allegations of sexual misconduct have sparked nationwide mass protests AFP / Saeed KHAN

The videos and photos, which had allegedly been shared in a group chat of coalition government staff before being leaked by a whistleblower, were first revealed by The Australian newspaper and Channel 10 late Monday.

The graphic images have prompted fresh outrage from female lawmakers and the Australian public, coming on the heels of the rape allegations that sparked mass nationwide protests.

The whistleblower, identified only as Tom, told the news outlets that government staffers and MPs often used a Parliament House prayer room to have sex, and alleged that sex workers had been brought into the building "for the pleasure of coalition MPs".

A protester is comforted during a rally against sexual violence and gender inequality in Sydney
A protester is comforted during a rally against sexual violence and gender inequality in Sydney AFP / Steven Saphore

He also said a group of staffers routinely swapped explicit photos of themselves and he received so many he had "become immune to it".

He said there was a "culture of men thinking that they can do whatever they want" and while he did not think the staffers had broken any laws, "morally, they are bankrupt".

One aide was immediately fired and the government has promised further action.

"These events have triggered, right across this building and indeed right across the country, women who have put up with this rubbish and this crap for their entire lives, as their mothers did, as their grandmothers did," the PM said
"These events have triggered, right across this building and indeed right across the country, women who have put up with this rubbish and this crap for their entire lives, as their mothers did, as their grandmothers did," the PM said AFP / Steven Saphore

Minister for Women Marise Payne said the revelations were "beyond disappointing" and highlighted the need for a government-ordered inquiry into parliament's workplace culture.

Cabinet minister Karen Andrews said she had had an "absolute gutful" of sexism in politics and her "conscience will no longer allow me to remain quiet".

She told reporters in Canberra that the ruling Liberal Party should consider gender quotas for its political representatives.

Australia's Prime Minister Scott Morrison says he is "shocked" and "disgusted" by leaked videos showing government staff performing sex acts in the country's parliament.
Australia's Prime Minister Scott Morrison says he is "shocked" and "disgusted" by leaked videos showing government staff performing sex acts in the country's parliament. ABC

The fresh sexism revelations on Tuesday prompted Indigenous Senator Lidia Thorpe to disclose alleged sexual harassment by four male politicians since she took office just six months ago.

Thorpe, a representative for the Greens party, told the Canberra Times the "brazen" harassment had included "suggestive" remarks and unwanted touching.

"These are men that write our laws - men that should know better," she tweeted. "What they've done is violating behaviour. It's physical. It's sexualising, objectifying behaviour - it makes me feel physically sick."

Australia's parliament has been repeatedly criticised for a "toxic" workplace culture that has allegedly spawned persistent bullying, harassment and sexual assault of women -- particularly in the ruling coalition.

Former government staffer Brittany Higgins alleged publicly last month that she had been raped by a colleague in a minister's parliamentary office in 2019.

The controversies have placed growing pressure on the prime minister, who critics say has fumbled the government's response.

Morrison grew emotional at a press conference in Canberra on Tuesday when talking about the importance of his wife, mother and daughters, also saying women had endured a "very traumatic" month.

"These events have triggered, right across this building and indeed right across the country, women who have put up with this rubbish and this crap for their entire lives, as their mothers did, as their grandmothers did," he said.

Tens of thousands of women this month joined "#March4Justice" rallies to protest sexual violence and gender inequality, calling for systemic change in politics and wider Australian society.

The opposition Labor party, which already has gender quotas in place, has not been immune from similar allegations. A Facebook group of female workers recently detailed alleged sexual harassment by male colleagues and politicians.