A smile does not look so good when you have food particles between the teeth, right? But that is not the essence of advertising. And if you have not noticed what was going on, it is paradoxical that the poster works.
Pay attention to lady hand at the top and at the six fingers. In the middle picture we can see a mysterious hand on man's shoulder, and the hero of the third image does not have the right ear. And this is not the massacre Photoshop, only clue advertising - food between the teeth distracts us from the rest.