Bad news for the guys. According to a new Australian study in the journal Biology Letters, women appear to have the ability to decipher with some accuracy whether an unfamiliar male is cheating simply by looking at his face! However, men can't do the same when looking at strange women. "Women's ratings of unfaithfulness showed small-moderate, significant correlations with measures of actual infidelity," wrote the team, led by Gillian Rhodes at the ARC Centre of Excellence in Cognition and its Disorders at the University of Western Australia in Perth. "More masculine-looking men were rated as more probable to be unfaithful and having a sexual history of being more unfaithful." They added, "We provide the first evidence that faithfulness judgments, based solely on facial appearance, have a kernel of truth." Men, on the other hand, seemed to have no clue. They tended to perceive attractive, feminine women to be unfaithful, when there was no evidence that they were, the scientists noted.