Does your husband or boyfriend have the classic masculine features such as a wide, angular jaw, a square chin and prominent brow? According to Australian researchers, males with these features are likely cheaters on their marriages or relationships.

The basis of that theory is the sexual faithfulness study made by the University of Western Australia research team. What should worry Lotharios is that women could tell if a man is cheating on the basis of these physical features.

The research, published Wednesday in the Biology Letters journal, had 34 male and 34 female respondents who were asked to rate facial photos of 189 men and women how masculine or feminine were the faces and their likely chances of being cheaters.

The 189 provided their self-reported sexual histories, and based on the analysis of the study, the women were 62 per cent accurate in determining a man's unfaithfulness, which was linked to how masculine the man's face was, not his physical attractiveness.

Only 23 per cent of the male respondents correctly identified the women cheaters, while 77 per cent failed, which was caused primarily by the men basing their conclusion on the attractiveness and femininity of the female faces.

"We conclude that impressions of sexual faithfulness from faces have a kernel of truth, at least for women, and that they may help people assess the quality of potential mates about whom they have minimal behavioural information," said Professor Leigh Simmons, co-author of the study.

For spouses who may find the study's findings hard to believe, they could instead check the 10 indicators of a cheating spouse, other than just physical features, according to the following YouTube video:

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