Women regularly fake orgasms to ensure that their partners remain faithful to them, a new report has claimed. Accrding to a report compiled by Farnaz Kaighobadi from Columbia University, Todd Shackelford and Viviana Weekes-Shackelford from Oakland University, 'mate-guarding' behaviour was found to be more common among those with suspicions their boyfriends and husbands might stray. The researchers surveyed 453 women, ranging in age from 18 to 46, who had been in relationships for at least six months, and more than half of those involved in the study admitted to having faked an orgasm. "One particular reason that emerges from a lot of studies is "to keep my partner interested in this relationship", or "to prevent him from defecting from the relationship or leaving the relationship for another woman'," the Daily Mail quoted Kaighobadi as saying. The researchers also found that the group of women faking orgasm was also more likely to have suspicions about their partners' fidelity as compared to those who said they had never faked an orgasm. The report has been published in The Archive of Sexual Behaviors.