"There's an even more powerful internal force at work, illustrated by a very interesting study done in the 1960s. A man by the name of Lester Luborsky used a special camera to track the eye movements of people who were asked to look at a set of pictures, three of which involved sexual images. One, for example, showed a woman's breast, beyond which could be seen a man reading a newspaper. The results were amazing. Many viewers were able to avoid letting their gaze stray even once to the sexually suggestive parts of the pictures, and later, when asked to describe the content of the pictures, they remembered little or nothing suggestive about them. Some people couldn't even recall having seen those three pictures at all.

What interests me is that, in order to avoid looking at the objectionable parts of the pictures, those people had to know in some part of their minds what the picture contained so that they could know to avoid it. In other words, when the mind detects something offensive or threatening to our worldview, it somehow deflects our awareness. This avoidance system is incredibly efficient. We know exactly where not to look." (SUN magazine, June 2000)
(Goleman, Vital Lies, Simple Truths - The Psychology of Self-Deception, Bloomsbury, 1997, p.107)