Who? In the case of Caleb, I assume because he has a religious objection to it - he thinks that a person cannot alter truly the gender given to them by God, an

Who? In the case of Caleb, I assume because he has a religious objection to it - he thinks that a person cannot alter truly the gender given to them by God, and thinks it would be against his faith to use pronouns in a manner that implies otherwise. Though I may be misstating his view, in which case I apologise to him - I have not seen anything he's written where he spells out the basis for his objection, and may be guessing / inferring wrongly. In the case of Monica, she would in fact do this in all but maybe a situation involving the singular they where she might prefer stylistically to use names (which seems fair enough, since it's clearer).