The Skeezyks doesn't chat either.

For one thing... who wants to chat with an old fogey anyway? Plus... I have absolutely no tolerance for argument. And I have the impression there's a fair amount of that that occurs in chat.
I also rarely post my own threads here on PC. And, when I do, they're not of a personal nature. Part of the reason for that is like what you mentioned about thoughts never leaving your head. My own ruminations just keep rattling around in my brain over-&-over. I'm more than tired of them myself. I don't want to bore anyone else with them.