Agreed. Great topic jane and a pretty comprehensive reply Sagacious.

Regarding boy/girl: I agree with Sagacious explanation, but there is another nuance to these words. In the case of male submissives whose kink might include feminasation, being called 'girl' and using pronouns such as she and her can be an arousing way of being addressed and emphasizes the difference.

The same with female submissive being called boy/boi.

And of course...there is the whole gender queer issue which also rely heavily on these names.