My son came home and said, 'Teacher made us write a letter to our future selves.' I said, 'That's great. What did you write?' He said, 'Dear Future Me, this is past me. I am eight. I have a gap in my teeth. I want you to know that I am currently in a meeting with my mom about whether a hot dog is a sandwich. I lost. The hot dog is not a sandwich. I am grieving.'