Dr. Phil has the answer and its just the kind of answer you would expect from him.
He says you can spot a cheating man simply by looking at his ring finger. (No, really. That's not an inuendo.)
On The Early Show this morning, Dr. Phil explained that men who have a ring finger longer than their index finger is one of the traits that indicate a cheating man. According to the good doctor, a longer ring finger is a sign of exposure to higher levels of testosterone while in utero. This leads to the presence of what some crackpots scientists call the "infidelity gene."
Dr. Phil also says cheaters can be detected by using brain scans. He explained that cheating and non-cheating brains have "distinct activity patterns." He claims that a cheater's noggin shows a lot of activity is every part of the brain, while a monogamous man's brain activity is concentrated in the back where the cerebellum is.
[Image via WENN.]