"I'm not having intercourse with these women when there's no chance of pregnancy," He said.
Joe, a married man with three teenage children, asked "20/20" To hide his identity because of the double life he said he leads online as a "Natural" Sperm donor. He said his wife doesn't know about his extracurricular activities, but he has written a book about his experiences entitled, "Get Pregnant for Free on the Internet with a Private Sperm Donor." Ref. Source 9