the whole point of self-id is that you can declare yourself anything you want. It does not have to be true (although people are "supposed" to act as if they think it is) and you can change back (and forth) as often as you like without any particular reason.
I am entitled to declare myself a Telegraph-reading Johnson supporter if I wish.
Nobody is entitled to oppress me by disputing it.
I am entitled to declare myself a Telegraph-reading Johnson supporter if I wish.
Nobody is entitled to oppress me by disputing it.