Single Sex Schools

I'm feeling stupid after reading an article in THE NEW YORKER (April 1, 2013)  by Marc Fisher on an elite boys' school (Horace Mann) and its crew of predatory pedophiles, who protected one another and covered up with high culture for decades. Of course. Their students made it into Yale. And other single sex schools were doing the same thing. Of course. It turns out that the Roman Catholic Church has been only one place among many where children encountered a systematic expertly-planned seduction. I'll admit that elite secondary schools fall outside my experience, but why did this expose shock me? (Okay, I am provincial.)