We tend to categorize and fragment our world because of our innate need to order and clarify. We possess built in learned spatial constancies that can be tinkered with through art. Art can provide an escape from boredom for both the artist and his followers. Art can hold attention and please through sexuality, unusualness, danger, portal to feelings, physiological stimulation or evoking a sense of closure. Abstract art can be a passageway to search out free-floating other realities.
Emotions are almost always irrational.
So much for art. The key to hypnosis may be the ability to achieve a state of complete abandonment of fear of the immediate environment. Maybe hypnotized artists would create freer works.