I tell them "FIRMLY" I am neither deaf nor stupid.
I had one who plonked her fat arse on me bed (and me leg) and started to fill out her forms. "Now what should we call you .... what do they call you at home?"
I replied "Daddy mainly ~ but you can call me Mr Snoopy or Sir"
She ran away

No doctor has ever called me anything but Mr so why should the fecking nurses want to get familiar? Cheeky mares ~ I have children older than them.
PS Come to that I have children older than most of the doctors.