The curious thing about that moustache and goatee is that when you look at the Mona Lisa it becomes a man. It is not a woman disguised as a man; it is a real man, and that was my discovery, without realising it at the time.
Marcel DuchampSince the tubes of paint used by the artist are manufactured and ready made products we must conclude that all the paintings in the world are 'readymades aided' and also works of assemblage.
Marcel Duchamp