your point about the "civilised mind" is absolutely bang on, dawg. i expect many men have fantasies about sex with very young girls/boys, but the thing about most people (i.e. the blokes here, with a few exceptions) is that that don't act on it, becuase they know the difference between fantasy and reality, and all the rights and wrongs that go with reality.
i hope i don't sound pompous, but i've had experience of probably hundreds (if not thousands) of young people, and i'm struggling to think of many girls (and boys, who mature emotionally even later) of 13, 14 and even 15 who were emotionally mature enough to sustain a sexual relationship, and certainly not (as callaway pointed out) to have enough knowledge and/or wareness to make an educated choice about having sex. and remember that i'm not talking about kids with a nice, middle class sheltered upbringing, i'm talking about streetwise kids from tough backgrounds.
children are being sexualised at a horrifically young age, these days, and it's getting younger all the time. apart from the fact that this increases the potential for abuse - emotional, sexual, physical - teenage pregnancies, etc., etc., it also means these kids never have a chance to [i[be kids[/i].
we as adults have the responsibility to ensure the safety of these kids, not fuck them.