Gentlemen may prefer blondes but britain 's most sophisticated secret service agent tends to go for brunettes , according to an extensive investigation into james bond 's love life .
In films blondes are often assumed as being clueless or as having more fun . How we are treated by other people can influence how we behave , so this may explain why blondes are more likely to behave badly compared to brunettes or red heads , or go home with their dates on the first night .
She said : " what is fascinating is that four of the five celebrity women to appear in the top five are brunettes , which would indicate that while blondes may have more fun , brunettes are seen to be more beautiful . "
In most societies , blondes are much rarer than brunettes ( more than 90 per cent of us have dark hair ) , so it may simply be that in a dark , noisy environment , blondes stand out .