Toby-
I would send a 10-year-old to [[en:Peyronie disease]] without reservation.
So long as this is not the only sexual information they see, as practiced by United States abstinence "education". Want to warp minds? Then let them only see pictures of sexual diseases and not of natural sexual organs when they're still young.
On topic: Whether or not we allow nudity should have nothing to do with whether it is in a negative or positive context (again with the obvious restriction that we have to follow laws, so illustrating [[pornography]] with public domain porn will, for the time being, remain impossible).
Regards,
Erik