I think it is a learned skill (much as other animals are trained). Elephants don't write or paint (for a lack of paintbrushes, colors etc.), usually. ;-)
As for the authenticity: You don't see the whole elephant all the time (especially during the more intricate strokes), so I'm not entirely sure it's authentic (I've come to see that things on YouTube are best taken with a spoon, if not a packet of salt..).
|