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They say you should never judge a book by its cover.

But men may have an inkling about how faithful a woman is just by looking at her face, a study suggests.
By studying photos of 34 women, the male participants were able to successfully identify which of the women had previously cheated on their partners in 59 per cent of cases, according to Coloradonewsday.com.

During test, male participants were able to successfully identify which women from a set of photos had previously cheated on their partners. The photos were shown in pairs - one of the women had cheated in the past, and one had always been faithful (stock image of a woman removing her wedding ring pictured)
The research was carried out at the University of Western Australia, led by Samantha Leivers.
As part of the study, the researchers asked a group of men to briefly look at photos of 34 women, but gave them no additional information about them.
The photos were shown in pairs - one of the women had cheated on a partner at least twice in the past, and one had always been faithful.

‘When asked to choose the more faithful of two women they performed significantly above chance,’ said the study, published in the journal Plos One.

The experiment was then repeated with another sample of men, which yielded similar findings.