Look to the culture. These boys are being bombarded with sex talk, images, etc...so not having the maturity to control themselves, they go after the weak. Morality being only in the eye of the beholder and the schools being too busy instructing the kids to respect all sexual orientations, no one bothers with teaching them how to distinguish between true right and wrong. And typical of human nature at its worst, they try to hide this disaster after the fact.
God help the children of this generation. They've got fools in charge of them.
It doesn't help kids to see slutty teachers released from prison, for getting their groove back with twelve year olds, only to become one of the greatest love stories of mankind.