When visiting my parents two weeks ago, I saw a photograph in the upstairs hallway. It was of me at eight years old, holding a six-month-old Tom. I took a photo of it, and later showed it to Tom:
Me: "You must have weighed 15 pounds. I'm surprised I could carry you."
Tom: "You were stronger back then."
Tom: "You could lift me up back then, and you can't now."