Smiling is the movement of facial tissue around the mouth. This uses muscles. a skeleton does not have muscles or facial tissue. Hence no smiling. read more
A smile is a movement of the lips, and skeletons don’t have lips. However, the idea of smiling or grinning has been a staple description of skulls for centuries. For example, the Jolly Roger skull and crossbones is called “jolly” because the skull is supposed to be grinning. read more