Hugging is very human. Actually, this behavior occurs in our species as well as quite a few other primate species, as we primates seem to seek out and enjoy ventral-ventral contact with one another.
Dogs are quite different, as they typically don’t enjoy hugs , no matter how accommodating they are to the humans in their lives who insist on it. To see a dog look displeased, or even disgusted, giving one a hug is often all that’s required.
Of course, I would not recommend hugging a dog for a very important reason that is related to but extends beyond that fact that dogs typically detest it. Many dogs bite when they are hugged. The bites are sometimes motivated by fear, and sometimes a reaction along the lines of, “Don’t you dare do that to me. Again. Ever.”
It’s pretty straightforward to me. Humans like to give and receive hugs. Dogs don’t.  When we hug them, most tolerate it in much the same way that children tolerate having their cheeks pinched by aging relatives—grudgingly and with an understanding that the people doing these dreadful things really can’t help themselves.
What’s far less clear to me is what dogs make of observing humans hug each other. I’ve known dogs with a variety of responses to hugs between the human members of my family or our visitors. Some dogs join the hug by jumping up and leaning into the action. Some leap onto the huggers repeatedly and with increasing vigor. Others place themselves between the huggers, causing them to separate. I’ve seen dogs spin in place or circle around the huggers, and I’ve known dogs who bark and growl when two or more humans hug in their presence. It’s unusual to have a dog who runs away, perhaps out of the room when they observe hugging, but I do know of a couple of dogs who did respond in exactly that way.
What does your dog do when you hug someone?
Photo by cobalt123/Flickr