A sperm donor who has fathered 78 children currently has 13 women pregnant.
American Ari Nagel, nicknamed 'the sperminator', revealed he used to have sex with the women to help them conceive.
However, he claims he now delivers his sperm in a 'cup' as he fears having unprotected sex with all of the women he helps.
The donor told the Clair Bryne Live programme he does not receive any money for his services, although he is paid in 'hugs and kisses'.
He said: "I've never charged any of the women for helping them grow their families.
"Of course I do get paid with lots of hugs and kisses and a lifetime of appreciation.
"I get a lot of joy of being a father to so many kids. Some of them I see every day, some of them I've never met. It's up to the family."
Mr Nagel, from New York, is currently in Florida celebrating his twins turning four-years-old, before travelling to Louisville, Kentucky, this weekend for another birthday.
Speaking about his time as a sperm donor and how he meets women, he said: "It varies, depends on where they are located logistically.
"A lot of women are just in the US so it makes it much easier, sometimes they are abroad.
"I went to Africa twice last month to try and meet women and help them conceive. The month before that I was in Barbados and then Georgia, the country not the state.
"The month before that I went to Russia so sometimes travel is involved but the vast majority of the time they are in the US."
He said all of the 13 women who are currently pregnant by him received his sperm in a cup and artificially inseminated themselves.
However, he added: "Around a dozen of my children were conceived the old fashioned way, early on when I didn't really know of another way to conceive that was the way I was going about it.
"But of course, now that I'm helping more than one woman in a month it's very difficult to have unprotected sex while still being able to protect myself and the other women I'd be helping that month."
