Bedrockgames, or to put it simply, Duchampe was subverting conventional notions of "What is art?"The First World War punctures modern Europe's illusory self-conception (although films like Warhorse seem designed to try and reestablish the illusion!). The Fountain is an expression of, and a reflection on, that point in the domain of the visual arts. It's a savage attack on what its author regards as a failed civilisation - and failed not due to external shock, but due to its own, radically conceited failure of self-understanding.
So you walk through an art gallery, adoring the Mona Lisa and other great artworks, and then suddenly you come to a urinal mounted on a wall, and that's there to challenge you -- the usual modernist stuff.
But AFAICT, this is the art world's interpretation of Duchampe. The art itself can be deeply personal, and artists may or may not be able to articulate their own opinions of their own art.
IMO, it's contemporary artspeak that I like to dismiss because I think its jargon and pretentiousness prevents it from being an effective and honest "ambassador" between the artist's work and the rest of the world.