Why do gorillas know how to stick out the middle finger?

The bottom of an elephant's foot is thick, flat, and padded.

Elephants do not exactly have fingers, but their trunk actually contains over 100,000 finger sized muscles. This gives them very fine control and dexterity. They can do very delicate tasks such as remove a peanut from the shell or paint a simple picture. The tip of the elephant's trunk has two extensions that are used like fingers for picking up objects and food.