I've heard that cats blink to show affection in part because they don't have a lot of face muscles to do anything else. As someone who has had both dog and cat

I've heard that cats blink to show affection in part because they don't have a lot of face muscles to do anything else. As someone who has had both dog and cat pets, it does seem like the dogs have a vast array of emotions they can display with their faces, and cats pretty much just stare and look like they're about to kill something. They can scruff their fur but they can't "smile" like dogs or look "guilty", they seem more static.