Just two minor things to say.
First, the schoolgirl look on women. This could, in some cases anyway, be down to tthe original St Trinian's films, if anyone remembers them that is. I can't say it floats my boat, but I did spend a while at a girl's school in the dim and distant past, and those girls certainly did not look lie or behave like the St. Trinian's girls !
Second, the finding young girls attractive. We live in an age where girls are, to some extent, encouraged by advertising, films and TV to wear the latest fashions and to put on warpaint in order to make themselves look as attractive as possible. This, coupled with ways of behaviour copied from some of the TV programmes they like to watch, can make young girls appear to be somewhat older than they actually are.
So based on looks alone, I wouldn't be at all surprised to learn that some of the young women I've seen around and thought of as attractive are in fact underage. That doesn't mean I find them sexually attractive (I prefer women closer to my age), just that I think they look good.
I'm sure there are some people who will conflate those notions to conclude that any man saying a girl of 12 - 14 looks attractive means that they'd like to get them into bed, but that's in their heads and probably says more about them, and perhaps society in general, than it does about the men they apply such thoughts to.