This is pretty clinicial, but probably not appropriate for all audiences. The New York Times has
an article about the dangers of riding bikes for extended periods of time. Among the choice parts of the article, I picked out these gems for your reading pleasure:
Dr. Goldstein added, "Numbness is your body telling you something is wrong."
Just as many smokers do not get lung cancer, many cyclists will never develop impotence from bicycle seats, the scientists said.
"We make kids wear helmets and knee pads," Dr. Goldstein said. "But no one thinks about protecting the crotch."
Cyclists became angry and defensive, he said, adding: "They said cycling is healthy and could not possibly hurt you. Sure you can get numb. But impotent? No way."
"Most people are not riding long enough to damage themselves permanently," said the spokesman, Marc Sani, publisher of Bicycle Retailer and Industry News. "But a consumer's first line of defense, for their enthusiasm as well as sexual prowess, is to go to a bicycle retailer and get fitted properly on the bike."
This has been a Public Health & Safety Announcement courtesy of the Homestarmy and sponsored by Kelloggs.