Craig,
Thanks for your comments on this topic. I didn't see that there was any way for me to understand why my father moaned, but I did endure it and often tried to find humor in it for both of us. That was the best I could do.
Robin

I moan.

Oh dear. Does anyone else without dementia do this?

It happens in that twilight period between being awake (usually reading sitting in a comfortable recliner) and falling asleep. I hear myself making a soft low moan, and I wonder what that is about, but I don't make an effort to stop doing it again a few times. And this is weird and I can't explain it, but it feels good to do it -- kind of comforting. Not that I am in a situation that needs comforting at that moment so I don't know what triggers this.