Excerpt from The Rosie Project by Graeme Simsion, ©2013:
“Wow, Mr. Neat. How come there are no pictures on the walls?”
“Because after a while I would stop noticing them. The human brain is wired to focus on differences in its environment– so it can rapidly discern a predator. If I installed pictures or other decorative objects, I would notice them for a few days and then my brain would ignore them. If I want to see art, I go to the gallery. The paintings there are of higher quality, and the total expenditure over time is less than the purchase price of cheap posters.”
True to a point, but I still like my art, posters, and decorative objects.