hugs stress dogs ?

in an article a canine expert Dr Stanley coren is clamming that dogs get stressed due to being immobilised during a hug when instinct is to (runaway)Dr coren analyzed 250 pictures of dogs hugged by adults and kids and he says that 81 per cent showed signs of discomfort or anxiety .myself i disagree strongly as all dogs i have had to my present two -robbie  the peke and mitzi the jack Russel  enjoy being hugged .