I don't know anything about the origin of this sculpture but I really like it. I found it on my artist friend in the Netherlands, Raymond Boekelder's facebook page.
There is something about a portrait with the tongue extended that is at once rude and yet compelling. The tongue is built to come in and out. It has an important role in receiving nourishment (we learned in high school biology that digestion actually begins in the mouth and on your tongue.) for the body. The tongue is also the primary tool we use for communicating with each other whether talking or in song.
In James 3:4 in the Bible we are told that the tongue is like the rudder of a ship. "And a small rudder makes a huge ship turn wherever the pilot chooses to go, even though the winds are strong."
The first time the tongue came out in a painting was with the letter licking painting. The working drawing is available here. It seemed interesting to me so I followed the trail into this painting and a few others.