I say when they show common sense they should be the ones deciding.
I was a teenager (the start of those years but it was still very late) when my parents finally decided to let me decide what my hair cut would be like. And in addition mom loved my hair very short so my big ear were always on display. I hated these hair cuts and she knew it, it took me many years to have the guts to say it but it showed that I hated it and I was still a few years away to being able to let my hair grow. I was always shy and this did not help and it also made things worst with the bullies. It is just one of the many ways my parents controlled me.
