Sickening crimes of the ‘Eunuch Maker’ who offered desperate men £25k to lop off their genitals with kitchen knives
HE dubbed himself “The Eunuch Maker”, carrying out extreme mutilations on troubled men with instruments designed for farm animals in rented hotel rooms and grotty London flats.
But Marius Gustavson didn’t just perform the vile acts of butchery for his own sexual gratification.
The Norwegian - who was sent to jail in May 2024 - was the ringleader of a website on which 22,000 online subscribers tuned in to watch live-streamed videos of the .
He headed a subculture obsessed with severing genitals, trading body parts, and even eating them - and pocketing hundreds of thousands of pounds in the process.
Yet despite his vile crimes, to many, Marius Gustavson was a hero - or even a god.
It was the way for the victim to finally become the person they saw themselves as.
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All had felt as if they had consented to what Marius would do to them.
Many even have no regrets about their castration.
But some came to realise how he had sucked them into his sick world - and paid the price.
“That website made it feel normal. I still thought I was in control,” said one victim, Michael.
“He then went to his wardrobe and brought out the clamps.
“That was the moment I knew I’d screwed up.”
Despite being sentenced to life in prison, Marius is unrepentant for his crimes.
In a new documentary for Crime+Investigation set to air on Monday, Marcel Theroux investigates how a quiet boy from a rural village became the leader of this underground movement, with thousands of followers worldwide.
Isolated misfit
Born in 1977, Marius grew up in a rural village on the outskirts of Drammen, a city near the capital Oslo.
News of his gruesome crimes sent shockwaves throughout the small community.
Remembering him as a tender-hearted boy who struggled to fit in, nothing had hinted towards who he would turn into.
“He was definitely not one of the cool kids, and probably lacked some social skills,” remembers Camilla, one of his former classmates.
Growing up as an only child in this isolated village, Marius would stay closeted until his late teams.
By high school he had started to come out of his shell, and afterwards went on to become a leading figure in the Drammen LGBT activist scene.
Soon after, however, he would have his first brush with the law - embezzling £5,000 worth of goods via the housing association he was leader of.
A couple years later, he did it again - this time embezzling £30,000, for which he served eight months in prison.
But despite what friends and family saw, Marius had long been set on the path that was to plunge him into the subculture of mutilation and castration.
What got me through the day was the next bit of fun I’d have - BDSM, bondage, sadomasochism
Michael
In the documentary, Theroux paid him an off-camera visit in Wandsworth Prison shortly after he pleaded guilty.
Marius reveals that aged 14 he became fascinated with a picture in a book of an Indian eunuch with their genitalia entirely removed.
“That’s who I am,” he told Theroux.
Sick website
In 2012, Marius left Norway for London after the breakdown of his marriage, immersing himself in a subculture of people obsessed with becoming a “nullo” - short for genital nullification.
Images of Marius posing with a severed penis and putting it in his mouth were also shown.
Other acts of butchery were carried out with kitchen knives, with amputated genitalia kept in the fridge to be sold on.
Michael, who has kept his surname anonymous, was introduced to Marius via a friend in the London kink scene in 2018.
“I was in a really bad place - I had a spiralling drug addiction, was depressed and suicidal,” he said.
“What got me through the day was the next bit of fun I’d have - BDSM, bondage, sadomasochism.”
Meeting him for the first time, he was shocked to see that Marius had intentionally removed his own leg by submerging it in a bucket of dry ice for eight hours.
“He said he’d thought it would be cool not to have one,” Michael told the documentary.
“I just thought f*** - this guy’s actually serious about what he’s doing.”
Making it clear he didn’t want to receive any permanent damage, Michael and Marius enjoyed a night of bondage and torture.
Marius then revealed his website to Michael, encouraging him to join.
Farmyard clamps
Though originally against the idea of castration, his mind was slowly being warped by world Marius had opened the door to.
“That website made it feel normal,” he continued.
“You were told all the benefits, how you could control your hormones, your sex drive. You’d feel empowered, you’ll feel better - no one said anything negative about it.
“He sent me a tariff of what videos would earn me in revenue: £5-7,000 for a testicle removal, £15-25,000 for losing your c**k.”
“I remember lying in bed, in absolute agony, as the video was posted. Then the messages started coming: ‘So cool’, ‘So hot’.
“A little eunuch badge appeared on my profile because I’d had a verified castration.
“The absolute celebration of it all - it was wonderful. It gave my profile clout.
“It was like fine, I’m committed now, so I agreed to have everything off.”
Perverted accomplices
Though the mastermind behind the website, Marius didn’t always work alone.
One, Damien Byrnes, had threatened to go to the police after never receiving money he had been promised for removing his penis - but was blackmailed into backing down with a video that showed him mutilating Marius.
Another was a man called David Carruthers.
Having worked for the NHS, he convinced Michael that he would be able to safely remove his dead testicles - despite not actually holding any medical qualifications.
Michael, Marius and David then rented an AirBnB in which they were to perform the operation.
But it was to lead to the Eunuch Maker’s downfall.
Lying on a bed with forceps hanging off him, Michael finally realised the terrible mistake he had made.
“At that point I’d realised how much damage Gustavson had done to me,” Michael recalled.
“I’d realised he had been talking bulls*** so much up until that point. I started to see that he was just a butcher.
“I remember lying on the bed... thinking I don’t care if I live or die, I just want to hurt him.
“Sure enough, he was out of there before I could stand up - all his camera equipment packed up and he had p**sed off.”
I remember him saying, ‘If we don’t do this, you’ll be really disappointed. You were born to do this.’
Anonymous victim
Despite his ordeal, Michael never received any of the money he had been promised.
His counsellor gave him an ultimatum - either Michael had to go to the police, or they would - so eventually he told them everything.
The subsequent police raid in 2021 uncovered hours of gruesome footage dating back seven years.
No choice
But while Marius did put pressure on his victims to undergo castration, many hold zero regrets about what they went through.
Unable to go through the NHS, Marius was the only way they could overcome their feelings of self-hatred.
One anonymous man who spoke to Theroux told of how for a long time he had struggled with his sexuality, harbouring a deep desire to rid himself of his testicals.
After joining the website and having a few meetings with Marius, he agreed to have a testicle removed.
“He never did anything against my will, but he did put pressure on me,” he said.
“I remember him saying, ‘If we don’t do this, you’ll be really disappointed. You were born to do this.’”
He later met with Marius and an accomplice called Peter Wates to finish the job.
“I was delighted,” he continued.
“I have an enduring sense of gratitude to Marius for helping me reach a position that medically in the UK isn’t possible.”
Edward, who was castrated in 2017, had originally been sympathetic towards Marius.
But this sympathy evaporated after he attended the sentencing.
“I shall always worry that Marius used a video of my procedure to persuade someone else to do something they didn’t really want to do,” he said.
Marius himself had earned over £300,000 from his website.
He was charged with multiple counts of grievous bodily harm, possession of extreme pornography, and for making an indecent image of a child.
The court sentenced him to life in prison, to serve a minimum of 22 years.
The botched operations nearly led to the deaths of three men, with the judge describing his actions as little short of human butchery.
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A further nine accomplices were also charged and sentenced.
The Eunuch Maker starts on Crime + Investigation at 9pm, Monday January 13
If you are affected by any of the issues raised in this article, please call the Samaritans for free on 116123.