Maybe it's time for the child to leave home when the parent launches into a life lesson and the child finishes the sentence and the rest of the lesson verbatim.
Or when the child handles the parent, obviously trying not to be condescending and the parent thinks, "Maybe he's right..."
I've always been one who wants to know before I go. A lot of Life is, 'you'll know when you see it'. Well, I think I'm seeing that my first born is a man.