i guess that the title "innocence?" was intended to contrast with your concept of 'sexy' in your yf or lg.

I did the title last - but yes, it's good to see how experience matches common perceptions of children. I was really using 'innocence' in the sense that people often use it to signify lack of sexuality or erotic nature in children: which is not the case.

then is sex meant to be naturally or unnaturally corruptive?

I think it tends to be seen as such. It comes back to a person's frame of reference. For the traditional moralists, there's often a conservative religious influence there; but the ire directed at the sexual expression of children tends to be more widespread than that. So I think there is also the fact that sexuality and eroticism has been stripped of much of its romanticism and people are often more cynical about it and they see it as something that children need 'protecting' from. Something about the poverty of emotional literacy I suppose. Distrust is endemic.