Why does the artist sign his painting? To show the world who created it. His work of art is a part of him, an outward expression of who he is. His masterpiece is the best of himself, shared with the world. he is proud of what he has created. It matters not, where that painting is hung. It forever belongs to the artist, and his signature reminds us all of that.
 

I have created a masterpiece. Her name is Naomi Victorie Rose. She is the outer expression of my inner self, a work of art, the best of who I am. My signature is written all over her. In her eyes and smile, in her laughter and tears, on her nose and her toes, in her interests and talents, in her courage and fears, in her genes and DNA, and most important, in her heart and soul. She may "belong" to others in her lifetime; her parents, her husband, her children, but she is my masterpiece. My signature proves that, and I am proud to be the artist."