Magritte's paintings, while traditional in technique (often oil on canvas), are innovative and witty in concept. Doubling, fragmentation, displacement, and irrational juxtapositions are his favored strategies.
Whether we attribute it to the power that women hold over men or Courbet's audacity to paint a frank image of a vagina as art in 1866, L'Origine du monde still has enough power to scandalize the censors at the social media giant, Facebook.
One reason classical paintings are so ripe for new titles is that a lot of them portray old stories that everyone's long forgotten. With religious paintings being inherently so serious, they're the perfect comedy set-up.
We Americans have become so sensitive, so wimpy, that we are in danger of ending up with art that avoids controversy at all costs. The name for such "neutered" art? Irrelevant art. Or, simply, bad art.