That's an interesting question. Mettaton doesn't know how exactly to answer it though. He wants people to know him so that they can pay attention to him and worship the ground he stands on, that much is clear. But he's not interested in having his dirty laundry aired, and he's already been screaming that he's fine into the face of anyone who asked.

...Still. He doubts that Kaworu has the mentality to disseminate the information to embarrass Mettaton, and he does need an out. So why the hell not?

"I don't need everyone to understand me. I just need them to know what I do and why I'm important!!" he replies at last. "Once you start getting psychological about things, then it's not the kind of drama anyone likes."

Take that as you will.