He yawns when you yawn.
Contagious yawns are widely understood to be a sign of human empathy, a similar phenomenon to sympathy pains. That empathy isn’t just limited to humans, though; dogs do it, too! Why? Because dogs were bred by humans to, among other things, be able to read and instinctively understand their owners. So if your pup yawns when you do, you know you can trust your bond— he loves you!
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