According to a 2012 study, women are likely to gauge correctly when a man is unfaithful.
34 men and 34 women participated in the study and were asked to score the faithfulness of 189 Caucasian adults from their pictures.
The researchers found that the female participants were better able to distinguish between those who were faithful and those who weren't when they compared their responses to the 189 people's self-reported sexual histories.