Apparently, an "extraordinary demographic shift" is taking place: teenage pregnancy is down: "The teenage pregnancy rate in America, which rose sharply between 1986 and 1991 to huge public alarm, has fallen steadily for a decade with little fanfare, to below any level previously recorded in the United States. And though pregnancy prevention efforts have long focused almost exclusively on girls, it is boys whose behavior shows the most startling changes." Apparently, it’s not just more sex with more contraception. The change seems deeper. Worth pondering. "Nowhere are the changes more surprising than in poor minority neighborhoods in Harlem and the Bronx, which a decade ago were seen as centers of a national epidemic of teenage pregnancy."