Dr. Stanley Coren, a professor emeritus in psychology at the University of British Columbia, has studied dogs and written about their behavior for years.

Last week, Coren posted on Psychology Today's website, that hugging a dog is stressful for the animal. He based it on indicators in photos on social media of dogs turning their heads away while being hugged, or licking their lips, closing their eyes, opening their eyes wide with the whites forming a 'half-moon shape'. You can click here for his full report as to why he concludes that it's stressful for the dogs to be hugged by humans.

Coren also says that most cases of dogs biting children in the face happen right after the kid hugged the dog.

And as you might imagine, social media exploded to contend that he's wrong.