My grandfather made his living from photography and he gave me two bits of advise (That I remember - he died when I was 10). 1. When you photograph people
compliment them. No matter what its about. If you cannot think of one, tell them they have a nice voice. 2. Always take a shower after you have a bath.
He also had a pretty thick accent so he used to make me laugh when he pronounced words "wrong"
Thanks for the question, it made me think of my grandfather and I have not thought about him in YEARS. I am now 40...