The reason is that they come in constant contact with our hands, faces and mouths -- in fact are exposed to more bodily bacteria than toilet seats -- and then are kept warm by the electronics inside.These cell phone bacteria include "Staphylococcus aureus, which can cause illnesses from pimples and boils to pneumonia and meningitis and is a close relative of the superbug MRSA," according to the article.
Ewww.
Maybe it's time we start putting condoms on our cell phones? Just a thought.