If you ask a class of seventh grade math students how many grams are in a kilogram and one of the students sarcastically drawls the slow response, "A lot," should the teacher be given a medal for finding it humorous instead of strangling the kid a la Homer Simpson?
I have noticed that my wife and I don't "get" some commercials which are obviously aimed for the youth market. It is not a sign of old age because the younger generation doesn't understand commercials aimed at my generation. The time to worry about old age setting in is when you don't understand any commercials.
Every now and then I feel like a man in an Easter Parade wearing only a thong and a bowler. I can walk with style and grace and confidence, but sooner or later I am going to notice that people are snickering.