What's amazing is that he is painting that with the brush stuck in his nose... let's see Picasso or Void's wife try that!
It's a bit different than sticking a brush up his nose....
The proboscis, or trunk, is a fusion of the nose and upper lip, elongated and specialized to become the elephant's most important and versatile appendage. African elephants are equipped with two fingerlike projections at the tip of their trunk, while Asians have only one. The elephant's trunk is sensitive enough to pick up a single blade of grass, yet strong enough to rip the branches off a tree.
It's the elephants "only" arm. :/ (4 legs and an arm/nose/lip)