Well, now we know.
Dr. Phil McGraw was a guest on Conan Tuesday night, and he got right down to the heart of things, explaining to the host that the marriage advice he got from his dad years ago is still some of the best he ever received.
“My dad gave me a really good piece of advice. He said, ‘Don’t ever miss a good chance to shut the f––– up.”
McGraw – who’s been married to his wife for almost 40 years – prefaced that gem with one of his own: “Look, when she says ‘What?’ – it isn’t that she didn’t hear you – she’s giving you a chance to change what you said.”
McGraw also expounded on the great celebrity nude-selfie leaks of 2014, which brought us the gem below. Good luck getting that one out of your head.