Two intro lines of a 40-year-old song by Buffalo Springfield have been running through my head the past couple of days. "There's something happening here, what it is ain't exactly clear," begins the song, "For What It's Worth." It came to represent a generation's opposition to the Vietnam War. But the opening words may come to reflect the uncertainty of a new generation facing an entirely different problem: female teachers having sex with male students. A 24-year-old Salpointe Catholic High School teacher resigned March 16 after allegations of a physical relationship with a student. Fortunately, Salpointe school officials notified police...