THE CROTCH PROBLEM Bicycle Boys often make the mistake of trying to turn their girlfriends into Bicycle Girls. Joanna, a woman who grew up on Fifth Avenue and now works as an interior designer, actually married a Bicycle Boy. "We both rode bikes," she said, "so at first it wasn't a problem. But I noticed something was kind of wrong when he gave me a bicycle seat for my birthday. Then, for Christmas, he gave me a bike rack to put on the car. When we got divorced, he took the bike rack back and kept it for himself. Can you believe that?" "Boys on bikes? God, no," said Magda, the novelist. "Can you imagine what a stinky crotch they have? No, thank you. I've been mowed down too many times by men on bikes. They're all kamikaze selfish pricks. If they have sex the way they ride their bikes, thank you, but speed is not important." "Women don't think riding a bike is sexy," said Thad. "They think it's infantile. But at some point, you decide that you can't go through life giving women a false impression of who you are."