http://a.abcnews.com/Technology/DyeHard ... 095&page=1
The parasite, Toxoplasma gondii, has been transmitted indirectly from cats to roughly half the people on the planet, and it has been shown to affect human personalities in different ways.
Research has shown that women who are infected with the parasite tend to be warm, outgoing and attentive to others, while infected men tend to be less intelligent and probably a bit boring. But both men and women who are infected are more prone to feeling guilty and insecure.
I still haven't read all of it so for all I know it could end in "April fool's!" or something.