'It's a boy!' or 'It's a girl!' are the first words almost all of us hear when we enter the world. Before our names, before we have likes and dislikes - before we, or anyone else, has any idea who we are. And two years ago, as Juno Dawson went to tell her mother she was (and actually, always had been) a woman, she started to realise just how wrong we've been getting it.Gender isn't just screwing over trans people, it's messing with everyone. From little girls who think they can't be doctors to ...