Quizzical look from him.
Me: And it wasn't just a passing flash either, I could not for the life of me remember if I am 51 or 52. I finally had to do the math to figure out that I'm 52.
Slightly concerned eyeball roll from him.
Me: I don't think this is a dementia thing though. I think it's just that after you have lived so many years, a year one way or the other simply doesn't matter anymore. I have too many other, more important, things to remember. Yeah, that's it.
Pause, and then slightly sheepish chuckle from him.
Him: Actually ... when you first said started telling me this, I couldn't remember how old I was either. Not till you said you were 52 and then I knew that I had to be 51.
Sometimes you have to use the buddy system.