It was news to me when it finally clicked that mental hunger is a sign of physical hunger, especially in those who have had eating disorders. I had internalized the idea that physical hunger is good, right, and true while mental hunger is bad, wrong, and deceptive. Reality is that if I'm thinking about food, there's a reason. When I'm properly nourished and engaged in other things, eating doesn't occur to me.
I love the dog analogy too. There are Greyhounds and there are Bulldogs. A Bulldog isn't bad, wrong, or unacceptable because it doesn't have the Greyhound's long legs and tucked abdomen. We're built how we're built. We can be a fit and healthy version of our own genetics, but we can't magically acquire someone else's through restriction and overexercise. It's obvious that we can't change our height or the size of our feet, but diet culture tells us we should be able to do anything we want with our weight, that if we don't all look like Victoria's Secret models, it's just a matter of willpower. That's such a problematic notion