Female here. Even if you somehow agreed this was a good idea (it’s not obviously) there’s only one answer a boy would give and depending on the school atmosphere two answers a girl could give: all or nothing. In other words, no truth would be told, it would be a big embarrassment and shameful experience, and what about if a boy rapes a girl and says later “she told the whole class she would have sex”. How insane can schools get?
Even the schools and teachers are part of the pro-sex peer pressure these days.