I would want everyone to take a few moments before reading the full description to work this out on your own. Though it isn’t that hard. The guys head is actually connected to the sitting body where as the girls face is hidden and connected to the body which is bent. And the explanations seems something out of a physics class. The angle is all that is doing the magic. For what seems like a normal hug can leave others giving the picture a second or even a third glance. Such is the magic of pictures.