Beautiful women, it seems, really do find life easier.
Whether it's in the office or in the courtroom, a new study backs up the belief that pretty women can broker deals more easily.
This, according to the research, is because beauty overrides the brain's reaction to fairnesss - a fact tied to a subconsciousness rooted in male evolution.
As part of the study, 21 male students at Zhejiang University in China, were asked to look at 300 photos of Chinese women.
A different group of men had judged half of the women as attractive and the half unattractive.
The men were then teamed up with some of the women whose faces they had just seen while playing a computer game.
In the game, they decided whether to split a small amount of money. At the same time, the researchers studied their brain waves and noted their response times.
They found men were more likely to accept bad deals from attractive women.
They were also quicker to respond to fair offers from good-looking women and slower to respond to unfair offers.
Meanwhile, brain scans revealed that men were more sensitive to unfair offers when the woman was unattractive, and felt greater reward when the woman was attractive.
University of Stirling psychologist Anthony Little, who was not involved in the study told people,it was not entirely clear why we behave differently toward attractive people.
'We appear to have a bias toward being nice to attractive people even when the rewards to ourselves, such as increasing the chance of a date, wouldn't apply,' Little said.
'This suggests our motivations to be nice to attractive people are unlikely to be based on conscious decisions to maximise our own benefits.'
Previous studies have also found a pretty face can be a source of lifelong advantage - beginning at secondary school.