Because you never know what trivial bit of information may ultimately prove to be vitally important.
No worse than Mary Poppins and "a man with a wooden leg named Smith."
I'd struggle with my family, too, if they called my stutter Liam.
It's called Queen's English.
My mother used to tease me for saying things like that when I was a kid. Once I said, "I saw a rabbit coming home from school today." She said, "How do you know it was coming home from school?"