0 used when the subject of the verb is "they" used as a singular pronoun, or a single person who could be any sex, and the object is the same person:
If someone wants a chance to push themself, they should be able to.
Seeing how someone thinks and expresses themself has always been the big attraction for me.
You won't be the first or last man or woman who gets themself involved in a holiday romance.
The reader has to decide for themself how to approach these parallel texts.
The person themself has to interact with the piece to appreciate it fully.
