Scientists have proved that a pretty woman has the power to throw a man's decision-making skills, a new report suggests.

Researchers at the University of Leuven in Belgium studied a group of 18 to 28-year-olds using financial games to test fair play and half of the group were shown images of sexy women or lingerie.

Men exposed to what researchers call 'sexual cues' accepted unfair play far more easily than men who were not and also struggled to make decisions.

"We all think we are rational beings, but our research suggests….that people with high testosterone levels are very vulnerable to sexual cues," said Dr Siegfried Dewitte from the study.

"If there are no cues around, they behave normally, but if they see sexual images they become impulsive."

Those in power are most susceptible to influences of opposite sex and the more testosterone the men had the more distracted and vaguer they become.