GENTLEMAN might prefer them, and they might have more fun than everyone else, but the days of the blonde are numbered.
According to scientists, within 200 years the image of a natural blonde bombshell could be a thing of the past, as a genetic quirk means fewer and fewer are being born. The last blonde is predicted to be born in 2200 Finland, the country with the highest proportion of blondes.
Experts say the reason for their demise is that the gene which creates blondes, MC1R, is regressive.
This means that for a child to be born blonde, it must have the gene on both sides of the family in the grandparents' generation.
But added to this is the fact that men are now opting for bottled rather than natural blondes, which even further reduces their chances of survival.
Through history being blonde has been about more than just hair colour. And scientists can even trace their power of attraction back to the ice age.
According to research published this week in the journal of Evolution and Human Behaviour, blondes evolved as a method of maximising their chances of breeding successfully.
At a time when food shortages and harsh conditions were taking their toll on the caveman population, women found themselves with a shrinking pool of potential partners.
Nature responded with a genetic mutation that produced light- haired, blue-eyed women who stood out from the crowd of brunettes, maximising their potential of snagging what few men remained.
Even cavemen it seemed preferred blondes.
Dr Lance Workman, an evolutionary psychologist at the University of Glamorgan said blondes send out certain signals which make them more sexually attractive.
He said, "A lot of people in Northern latitudes are often blonde but as they get older their hair gets darker.
"Because years ago we couldn't count or didn't have any concept of ageing we looked for signs of youthfulness and fertility.
"And being blonde is a sign of that, along with signs such as an hour glass figure and a good waist hip ratio.
"It's what is known as sexual selection.
"This male choice is a big driving force in our species. In most other species of mammals the males don't invest in their offspring but with humans, males help to rear them which means they're more choosy about who they mate with."
Rachel Eling, deputy style editor at Heat magazine said the reason blondes such as Jean Harlow have made such an impact on our cultural psyche is because of their ability to stand out from the crowd.
She said, "Blondes stand out precisely because they are dying out. There are fewer and fewer of them which makes it an iconic thing.
"It's something to do with the light reflection, they're instantly dazzling especially with super blondes as it's quite rare. And it works really well on film because they really do sparkle like a star."
Over the years stereotypes have grown up surrounding the hair colour, which according to dating expert Henry Enos from the University of Glamorgan is the result of Hollywood and stars such as Marilyn Monroe, which associated it with sexuality.
Alexandra Morgan, 22, a model from Newport is a natural blonde, and she said she's inclined to agree with some of the stereotypes, at least definitely that blondes have more fun.
She said, "When I was younger I was white blonde but as I've got older I've gone darker so I started having highlights in it.
"A lot of people say that blondes have more fun and in some respects I think that's definitely true. Blondes get noticed more than brunettes, they're often more striking."
But Gemma Black, 22, who works as a senior insurance clerk at Admiral Insurance in Cardiff said she doesn't agree.
She said, "A friend of mine has dark hair and dyes it blonde in the summer and she says she gets more attention from men when she's blonde but I don't think it makes any difference.
"It's about your personality not your hair colour."
But more recently many stars have rejected the hair colour in an attempt to escape the stereotype and change their image.
Ms Eling said, "Recently there's been a lot of signature blondes that have gone brunette.
"Reese Wetherspoon went dark for Walk The Line and a lot of people will do it if they're trying to move away from their image like Nicky Hilton. It's substantially changes the way you look and is a way to make your image a bit more serious."
More famous for the pale skin and dark hair of stars such as Catherine Zeta-Jones, Wales has a below average quota of blondes, so the lucky few stand out even more...
Still as blonde today as the day she started singing Bonnie Tyler, is one of Wales' most international blondes.
A hairdresser from Cwmbran, when she appeared on Big Brother Helen proved she was blonde in more than just her hair colour.
Savage has proved it's not just Footballers' Wives who are devoted to grooming. He's borne the brunt of many a blonde joke.
Amanda Protheroe Thomas
She might be a tomboy with her adventurous TV career, but Amanda's never at risk of lacking femininity.