Tito the Wonder Dobe had a sharp stick poke him in his hind leg out in the woods and after it was removed [YEARS after, long and completely healed] any time he was in trouble, up came that leg with the big sad eyes.
It always worked on me.
I wonder if it works on other dogs. If I was displeased with her, I’d let her sulk for a minute, then call her over and say “OK” and she’d bound off, all forgiven. It’s not as though it got her out of any trouble. Maybe she thought it did. Or maybe she thought I was gullible.