I one think the problem is that often the grooming involves getting the kid to do something that is not sexual that they know is against the rules before assaulting them. Get the kid to take a drink, look at porn. Then the kid feels like telling is a problem because they have broken rules, too. I noticed how many of these situations had the perpetrator giving pleasure to the kid as a starting point. How guilty does that make the kid feel, and how much less willing are they going to be to tell someone? I think good touch-bad touch is a starting place, but a more direct conversation about how pedophiles keep their victims from telling is in order as well.