'As pointed out earlier, your classmates may talk about sex ALL the time or make boasts about their alleged encounter.'
For goodness sake its natural for kids of that age 13+ to talk about sex...its new (or it should be), its confirmation that they are naturally developing into adolescents and that their curiosities are awaked. They might boast but likely they are simply not telling the truth, if they are then thats an exceptional circumstance and it is at the fault of the parents.
Here we can see the WTBTS attempting sexual repression at an early age; dont be tempted into talking about it, dont think about it, dont even consider it. All this curiosity is natural in my view and this is the opportunity for parents to be open and honest about it but at the same time instilling some clear moral guidelines.
A friend of mine told me that he was made by his parent to go the elders because he had had a wet dream when he was a teenager, how misguided was that? Luckily, (if you can call it that), the elder who he went to apparently told him it was natural and not to worry but to avoid thinking about it.
The society do not have a clue!