A British man who is believed to be the world's most prolific sperm donor fathering more than 800 children finds his clients through Facebook, reports The Telegraph.

In an interview to BBC, 41-year-old Simon Watson spoke about donating sperm for 16 years.

He said: ‘I'd like to get the world record ever, make sure no-one's going to break it, get as many as possible,’ he said. ‘Usually one a week pops out. I reckon I've got about 800 so far, so within four years I'd like to crack 1,000.’

Watson has taken his business online and finds clients on Facebook, charging them 50 pounds for his ‘magic potion’ (that's what he calls it).

Along with answering his clients' questions on any hereditary diseases he might have, Watson also gets regular tests every three months and posts the results on his Facebook page. The other things that fill his timeline are the many, many pregnancy and baby announcements, said a NDTV report.

‘I've got kids all the way from Spain to Taiwan, so many countries,’ he told BBC.

Watson is a full time sperm donor and has three children of his own from two marriages. He started donating sperm soon after his first marriage ended.

‘'I've got no plans on stopping, as long as everything still works. I've got children all over the world now, and the parents are always so grateful,’ Mr Watson told Metro.co.uk.