Governments around the world have grappled for years with a surprisingly tricky task — stopping kids seeing porn online.
There are all sorts of factors that make it a near-impossible task.
Porn is everywhere on the internet, and kids are naturally curious. It's across social media, forums and chat groups, and the biggest porn sites are some of the most popular websites.
And kids spending hours a day on smartphones and computers are bound to stumble across it, even if they're not looking for it.
The concern is the impact porn has on how younger teenagers form ideas about sex and relationships, particularly degrading views of women.
But despite many attempts, governments have so far struggled to find and put up any kind of meaningful barriers.
The federal government has announced it's going to give it a crack as part of a broader response to gendered violence.
There is no obvious solution, so it's likely various options will be trialled as part of pilot programs.
How are young people accessing porn?
The task of blocking access to porn for kids is hard because there is so much of it, and it is so easy to access.
Research from the eSafety commissioner found 75 per cent of Australian children aged 16-18 had viewed porn online.
Nearly 40 per cent had first accessed it before they were 13 years old, and just under 10 per cent saw it before they were 10.
The majority were accessing it through dedicated porn websites.
Sites like Pornhub are massive, with billions of visits from across the globe each month.
It regularly ranks in the top 20 most visited websites in Australia, alongside pages like Google, Instagram, Netflix, Amazon, News.com and the ABC.
Social media was the second most common platform, despite the efforts of some major companies (like Meta) to filter images out.
And it's not the "extreme" content online that concerns governments and authorities like the eSafety commissioner.
eSafety has said the primary concern is "mainstream" content — aimed at straight men, and making up most of the online market — arguing sexual violence and degrading behaviour towards women is common.
A New Zealand study of porn commonly watched in the country found one in 10 clips showed physical aggression, and one in three showed non-consensual behaviour.
eSafety says while research into the impacts of porn on children is complex and sometimes conflicting its primary concern is a link with gendered violence.
How does the government think it can tackle the problem?
The federal government readily accepts that kids coming across porn is a problem, and addressing it is a critical plank in broader measures to address violence against women.
But for all that will, finding a solution is extremely tricky.
The UK spent years developing plans to try to verify the age of people accessing porn sites a decade ago, only to abandon its plans in 2019.
It developed a proposal that would have required porn sites to verify the age of people accessing their pages, using tools approved by the porn industry itself.
It prompted criticisms that whoever is collecting the data — including possibly companies set up by the porn industry — would collect a database full of the details of people legally accessing porn.
That was viewed by many as a huge risk, and a clear target for hackers.
But it did find one useful weapon in its arsenal.
The UK regulator was confident it could work with companies like Visa and Mastercard to block payments to porn websites that weren't complying with their laws, cutting off a huge source of revenue.
eSafety recently put together a roadmap looking at other options to establish an age verification scheme in Australia.
It looked at newer technologies designed to get around requirements for porn users to have to provide personal documents.
It considered facial analysis tools, which look at an image or video of a user and estimate their age, to be promising both on their accuracy and their ability to protect a user's privacy.
It also looked at third-party "tokens", where a provider checks a person's age, and issues a token which can be used to access porn websites.
That way the company issuing the token doesn't know what it is being used for, and the porn website only has to verify the user's token without recording the visit.
But responding to the roadmap late last year, the federal government decided the various options simply were not developed enough to be worth considering.
What will Australia's pilot look like?
Despite those concerns from late last year, the government is now pushing ahead with a pilot to try and test some of those ideas.
It's not yet known what it will involve, with the government saying $6.5 million will be included in the May budget, and work will begin then to figure out who will run it and what will be tested.
It may also look beyond just porn and into areas like video games, too.
Responding to eSafety's roadmap last year, the government set a few tests that any age verification scheme would have to meet.
They included confidence it can't be circumvented, can be easily applied to companies based abroad, and don't risk the privacy of adults looking to legally access porn.
There is optimism among some in the government that the technology looked at by the eSafety commissioner only a year ago has already improved.
The UK is also going down the path of age verification again, considering other options like allowing banks, telcos and credit card companies to verify the age of customers.
But finding a solution that meets the test the government has already set for itself — achieving what hasn't really been achieved anywhere else — would be a remarkable feat.