A Spottl Prouac is more commonly known as a person for whom every smile has been used up. This is similar to reproductive differences between the sexes, namely a woman is born with a finite number of eggs, whilst a male can seemingly produce a limitless supply of sperm from adolescence onward.
The poor Spottl Prouac has been born with a limited supply of smiles- there is no test for this and it only becomes apparent when the person, of either sex, can no longer smile. What a tragedy- to live ones life being unable to join in with social codes. Still, at least they are unable to give false social smiles, which we are able to sense but rarely do anything about.
The picture has been modified to show how the Spottl Prouac would like to look, with nice white teeth and a Mallen streak, though we doubt that anything will make this personage happy.