There are people who have the genuine belief in their “other” aspect of themselves. So thats how they prefer to be referred to. I think poking fun at that is unnecessary and wrong, its kind of as simple as that. Not something exclusive to this situation, just a pretty decent general rule.

What I would say the verdict is absolutely out on is a “why”, and the impact it has on individuals. So a bit of courtesy and basic decency is all thats needed.