I do very much believe in using humor. I also like to try to lighten the moods of public servants. One of my favorite ploys is to get a cup of coffee and when served by a waitress or waiter that does not know me I tell them that I used to drink the coffee with cream and Sugar but I had to stop because it caused sharp pains in my right eye. Usually met with "Really?". Yep, I forget to take the spoon out of the cup.