Men are more likely to cheat on their partners if they earn less or stay at home with the children, new research shows.
According to experts at Cornell University in New York, the more a guy is financially dependent on a woman, the greater the risk that he will stray.
The authors of the study examined the behaviour of a group of 18 to 28-year-olds who were married or living with their partner.
They suggested that male pride may explain the findings, with men seeing affairs as a way of reasserting their masculinity.
However, the research showed that there is also a higher risk of infidelity among men who earn substantially more than their partners.
The researchers said this may have something to do with the nature of their jobs, as long working hours, frequent travel and higher incomes make it easier to hide affairs.
A separate study carried out recently by extramarital dating website IllicitEncounters.com revealed that men are twice as likely to be caught cheating as women.