Junior Jo?

There is, I feel a lot more to this whole notion of 'being a  girl' than perhaps I had thought of like the notion of age ranges, the extent to which you may be in or not of that 'Headspace' and just what the role of dress is than I first thought about when I joined Girltalk in January.
Like I tend to think in terms of being twelve but how do square that with having other bits that are clearly Junior and when I was a Junior I wasn't as forward as some of my peers anyway and a bit of this shows in the pull a dress like has on me that your cool twelve in the first year or so of high school would run away from?