A sperm donor who claims to have fathered more than 800 children has revealed he sells his so-called "magic potion" on Facebook for just £50 a pot.
Simon Watson, 41, has been donating his sperm for 16 years but has chosen to bypass sperm banks and conduct his business via social media and other websites.
Mr Watson, who has two sons, aged 17 and 19, from his first marriage and a 10-year-old daughter from his second marriage, recently broke up with his girlfriend of three years due to pressures of the job.
"She was fed up with what I do," the donor, from Luton, Bedfordshire, told the BBC's Victoria Derbyshire programme.
I'm always running off here and there to donate, so it must have got on her nerves. I've been donating for a long time now - I used to go through sperm banks, but doing it myself is much more convenient for me.
"I generally advertise on Facebook - it's the way forward. You can see what people are like on their profile, it's quite a safe way to do things."
He continued: "I've had way more than 800 children over the years - they're just the ones I know of� I usually have a kid pop out somewhere every couple of weeks at least, usually more often. I've also had a few sets of twins. Some women say it should be free, but I don't think £50 for a pot of the magic potion is a bad price."
Mr Watson is now hoping to "crack a thousand", according to a BBC press release.