I narrate my own life. Not all the time. Just occasionally. And only when I'm the only known human in the area. Like, just now, I ran downstairs. All four of the cats were hanging out in my living room. I greeted them with, "Hey, every meow."
Then I added a dialogue tag: "I say."
That's what I said!
"'Hey, every meow,' I say."
(Interestingly, that's the first time I've ever caught myself narrating in present tense. Good to know my current WIP is getting that far into my mind!)