http://www.tate.org.uk/art/artworks/duchamp-fountain-t07573
https://www.guerrillagirls.com/naked-through-the-ages/
https://en.wikipedia.org/wiki/Guerrilla_Girls
http://www.tate.org.uk/art/artworks/guerrilla-girls-do-women-have-to-be-naked-to-get-into-the-met-museum-p78793
https://theculturetrip.com/north-america/usa/illinois/articles/the-controversy-of-killer-john-wayne-gacys-artwork/
https://en.wikipedia.org/wiki/John_Wayne_Gacy
https://en.wikipedia.org/wiki/The_Holy_Virgin_Mary
https://qz.com/441976/chris-ofilis-controversial-dung-decorated-virgin-mary-painting-sold-for-4-6-million/
http://www.manet.org/luncheon-on-the-grass.jsp
http://mentalfloss.com/article/72782/15-things-you-might-not-know-about-manets-luncheon-grass
http://totallyhistory.com/the-last-judgment/
https://en.wikipedia.org/wiki/The_Last_Judgment_(Michelangelo)
https://en.wikipedia.org/wiki/Guillermo_Vargas
https://www.theguardian.com/artanddesign/2008/mar/30/art.spain
https://en.wikipedia.org/wiki/Orlan#The_Reincarnation_of_Saint-Orlan
https://en.wikipedia.org/wiki/Rhythm_0
https://www.guggenheim.org/artwork/5177
https://en.wikipedia.org/wiki/The_Physical_Impossibility_of_Death_in_the_Mind_of_Someone_Living