He could introduce himself to me as an antelope, it doesn’t make it true.How lovely, another thread of hundreds of comments where old out-of-touch guys get angry about trying to give people basic respect.
Gender identity is similar to a name, if someone introduced themselves as John you wouldn't suddenly start calling them Peter because it's your right to call them Peter, would you? It's a little odd. If someone introduced themselves as female it's also odd to call them 'he'.