Looking at the work of Franz Xaver Messerschmidt I simply cannot stop smiling. Wonderful!
"Franz Xaver Messerschmidt (February 6, 1736 – August 19, 1783) was a German-Austrian sculptor most famous for his “character heads”, a collection of busts with faces contorted in extreme facial expressions. He was expelled from his university position for being an oddball. Some say he suffered from “brain rot” and Chrohn’s disease which made him contort himself into severe positions for his many self portraits. Boring these are not."