Britain's "most prolific" sperm donor is reportedly a proud fascist who leads a far-right organisation.
Clive Jones, 67, offers his sperm through Facebook and claims to have fathered 140 children in the past decade.
The retired teacher previously claimed he helps couples to have children because he "feels the happiness it brings".
However, it has now emerged Jones is one of the leaders of the New British Union (NBU) - a group which promotes "total Aryanism".
The organisation worships the fascist leader Oswald Mosley, who set up the British Union of Fascists (BUF) in 1932.
In a picture published by The Mail on Sunday, Jones can be seen wearing a black shirt and an armband featuring a fascist symbol.
The newspaper reports that he admitted he "became a fascist" many years ago in a video shared online.
In his twisted social media posts, Jones calls for action against immigrants, warning: "It will soon be too late to do anything. We will be outnumbered".
The sperm donor told The Mail on Sunday: "I'm a proud fascist and a proud nationalist, although some people would probably interpret that in the wrong way.
"I'm not interested in white supremacy or racism. I believe in democracy, I'm anti-capitalist and I'm happy to say that I do worry about the English race being overtaken."
Jones started donating his sperm aged 58, but was unable to become an official sperm donor because banks have an upper donor age limit of 45.
Health experts have issued a medical warning regarding his activities, saying that all donors and patients should be treated at a licensed UK clinic.
Mr Jones, 66, told Derbyshire Live he's had a lot of people question him over why he does it, but believes they would understand if they saw the "happiness it brings" to the families he provides his free donations to.
He said: "I'm probably the world's most prolific sperm donor with now being at 138 'babies', well, 129 babies born, nine ongoing pregnancies. I might continue for another few years. Get to 150 anyway.
"I know of clinics and sperm merchants with greater numbers but they don't donate, but rather sell semen.
"I think people would understand more if they saw the messages I get and the photos of the babies with very happy mothers.
"I feel the happiness it brings. I once had a grandmother message me thanking me for her granddaughter.
"I do it for free, though sometimes ask a bit for petrol. It's illegal to charge and doesn't seem right to take money when I have more than them."
Jones, who has three grown-up children of his own, said: "It all started in May, over nine years ago. For some people, having children is very important as it was for me.
"I read in some newspapers the plight of some people that can't have children. Reading the newspaper, it explained how people were using Facebook to make arrangements.
"I thought I could help so I put a post on one of the sites. I wasn't expecting any response with me saying how old I was, but I had a lady in Derby contacting me within an hour asking me to help that evening.
"I've not advertised I'm a donor in years. It has not quite worked out as I had guessed, I'm just as busy now and have so many people contact me through people just talking, referring."