Matthew, a pediatrician from Michigan, says he first donated sperm at the suggestion of a patient's parent. "I was in a long distance relationship at the time, so I sure wasn't using it," he says. For the next four or five years, he says he donated several times a month.
"My initial motives for being a donor are the same kinds of motives that somebody has when they donate blood or sign up on a marrow registry or sign their organ donor card on their driver's license," he says. "It says, 'If I'm not using it, and it's useful to somebody else you know, that's a good thing.'"