Dr. Lei Nuo, I presume.

I was thinking about something my father said to me while we were jogging in Maine. He was exhorting me to get a PhD, and said that he was tired of correcting people who called him 'doctor', either covering their bases or simply assuming as much. Well, I'd been called doctor before on various research trips and at different meetings, but it's extremely widespread here. I've gotten two emails today alone with the Dr. title, and Alessandro's gotten one as well. I don't think that's a good enough reason to spend five years working on a PhD, but I can certainly imagine it becoming embarrassing or tiring after a while.