"If it's all the same to you--" and she knew it likely wouldn't be "--I rather thing sir is a simpler thing to say than Superman."

It was true that there were other quibbles on which they must attend. Other things to be discussed. But they wouldn't get much far in discussing them until she felt comfortable with one moniker or the other. Ideally, a Mister would be most appropriate.

But Mister Superman sounded ridiculous.