Too repugnant to read?

It's been done before. If you handle it sensitively and really get into the guy's head you should be OK. It's not so much the graphic detail of WHAT he wants to do but WHY he wants to do it. Most pedophiles, if that's where you're going, claim they love their victims and aren't hurting them. They're narcissistic and incapable of empathy with their victims. If you want to know that the teacher would think, ask.