Art can be anything.

I mean, ANYthing. It could be a beautiful marble sculpture of a pretty little girl sitting on an old man's lap... (gooble search for Los primeros frios – Miquel Blay) I can't link to it here...

(There's also La Leçon de Musique by Leon Larogue found in Pigtails In Pink.)

... to a "log" in the toilet that you look back at after getting up.