This is totally off topic, but it made me think how my MD doctor refers to herself by her first name when she tells me to call her about something, where as I only refer to her as Dr. LastName. My last therapist was a PHD and I only refered to her (in emails and voicemails) as Dr. LastName, but my current T is a LCSW, so I refer to her by her first name--which is how she referred to herself in the original e-mail she wrote to me, so that made it easy.