Like a bad penny—or like an abusive ex-husband, or a public policy cancer—abstinence is back, just when we thought it was gone. Through the 1970s, U.S. policy was to reduce teen pregnancy. In 1981 the goal was changed, to funding programs to reduce teen sexual activity. During the Bush Administration, $1.5 billion was spent trying to get kids to have less sex. These programs failed completely (other than transferring federal case to Bush supporters). In 2009 the federal government ended most funding for abstinence (although states and school districts continued funding abstinence programs locally), and began funding comprehensive sex ed.…