Yeah, these kids are going to experiment with what they know whenever they know it. If they're missing a vital piece of information, it means the experiment will not be a complete success... which is kinda the point. Ignorance is a form of protection, until their judgement has advanced to the point where they will (hopefully) make better decisions. You simply cannot expect a child of that age to think through the potential consequences.
Besides, until the hormones take over, kids are pretty much non-sexual beings, and we should let them enjoy that for a little while. Sex complicates everything.
Apparently, the whole "<opposite genders> are ICKY!" phase of development has already vanished, because my daughter reports first-graders habitually kissing on campus. Not a surprising development, when kids are being bombarded by sexualized messages. So when a parent says, "You're not ready for this," that's a good counter-argument to what the culture is telling them. It says slow down, all in due time, and for now just enjoy being a kid.
