Screaming Penguin - Source Does Matter

It really does make you go blind:

Researchers have finally found evidence for what good Catholic boys have known all along – erotic images make you go blind. The effect is temporary and lasts just a moment, but the research has added to road-safety campaigners’ calls to ban sexy billboard-advertising near busy roads, in the hope of preventing accidents.

The new study by US psychologists found that people shown erotic or gory images frequently fail to process images they see immediately afterwards. And the researchers say some personality types appear to be affected more than others by the phenomenon, known as “emotion-induced blindness�.

David Zald, from Vanderbilt University in Nashville, Tennessee, and Marvin Chun and colleagues from Yale University in Connecticut, showed hundreds of images to volunteers and asked them to pick a specific image from the rapid sequence. Most of the images were landscape or architectural scenes, but the psychologists included a few emotionally charged images, portraying violent or sexually provocative scenes.