"When you are as old as I am, , ,", Rocky told me at breakfast.
I bet we are in the same decade," I replied.
"I am seventy-one," said Rocky. "How old are you?"
"I am eighty-one. If I were a year younger or you were a year older we would have been in the same decade."
(My daughter met Rocky later. She told me Rocky looks older than I do. Ivy is a sweetheart.)