The claim that blondes have more fun is to be put to the test by a team of scientists.
Based at the University of Edinburgh, the experts hope to discover why people have different colour hair and how it affects them.
Dermatology professor Jonathan Rees, who has already completed extensive
research into red hair, said: "Curiously, for all the jokes about dumb blondes, we can
hardly say anything sensible about blonde hair.
"We are very ignorant of its genetics and we don't understand why some people
are blonde and others not."
The scientists hope to discover why people's skin responds differently to sunshine depending
on hair colour and what advantages there may be to having blonde hair.
Professor Rees said: "The strangest aspect of living in Northern Europe is that we
get used to seeing people with different hair colours.
"We forget that for the majority of the world hair is almost uniformly black,
whereas in Europe, red hair and blonde hair is quite commonplace."
Professor Rees is looking for people of all ages to help with the two-year project.
Their hair would be photographed and studied by the team who are particularly
keen to find volunteers whose brothers and sisters or parents also have blonde
"We are curious as to why blonde hair developed in Northern Europe and
nowhere else in the world and also want to understand the way it is inherited
in families," said Professor Rees.
"To do this we need to collect people who have blonde hair in early adult
life, look at hair colour and study the hair colour of their families. All this
can be done simply by asking questions and taking modified photographs of hair