Of course it would take a bunch of scientists to determine once and for all what women have known about men for centuries:

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”.

Which of course gives technocrats and moralists a chance for drive-by-preaching:

The Brake spokeswoman says companies should think about the consequences of placing emotionally charged billboards at dangerous road junctions: “We should be concerned if drivers are experiencing split-second breaks in concentration, which could result in an accident or death on the roads.”

See! See! They know what is good for you! If you don't listen you'll get in a car accident!

So, umm... wear clean underwear... sort of thing...