Guest host Sean Cole talks to a man who is known as a sort of super sperm donor. When he was young,made a pact to remain a virgin and focus on science. As he got older, he saw a way to also help people - childless couples - by donating his sperm for free. He is meticulous about his health - no drinking or smoking. To enhance his fertility, he eats a lot of fruit, protects himself from air pollution and is careful using a computer.