> That said, if you allow your own mature 9 year old daughter or so to have laissez-faire, unmonitored sexual relationships [..]
What I can say is that my sister does fit that description, and she alright
If that's true, you might want to be careful with sharing that online. Whatever I think, the law is a different matter entirely and social services look grimly on parents who are allowing underage children to have sexual relationships.
Again, good luck.