Buzz·Posted on 2 Nov 201617 Surprising Facts You Probably Didn't Know About RedheadsBlondes may have more fun, but redheads have more sex.by Mat WhiteheadBuzzFeed Staff, AustraliaFacebookPinterestTwitterMailLink 1. Red hair is a mutation. Tap to play GIF Tap to play GIF 20th Century Fox Basically, red hair is caused by a series of mutations in your MC1R gene. It's a recessive trait, so both parents need to carry the trait for it to be inherited. 2. And redheads are more likely to be left-handed. Tap to play GIF Tap to play GIF Fox Recessive genes apparently often appear in pairs. 3. Having red hair and blue eyes basically makes you a unicorn. Tap to play GIF Tap to play GIF EuropaCorp Another recessive trait, having blue eyes and red hair is apparently the rarest combination in the world. 4. The Dutch celebrate a festival in the first weekend of September called Roodharigendag, or Redhead Day. View this photo on Instagram instagram.com Located each year in the city of Breda, the festival includes activities like pub crawls, markets, art exhibitions, and a huge group photo. 5. Redheads make up only approximately 2% of the human population. Tap to play GIF Tap to play GIF Disney 6. It's believed redheads require more anaesthetic than other hair colours. Tap to play GIF Tap to play GIF MTV 7. And contradicting studies have found redheads may have very different reactions to pain. Tap to play GIF Tap to play GIF Netflix While one study found redheads had lower thermal pain tolerance, the second study tested humans with an electric shock and found redheads had a higher threshold. 8. There are also reports of redheaded women bruising a lot easier than women of other hair colours. Tap to play GIF Tap to play GIF NBC OK so there's no science to back this up. In fact, studies done couldn't find reasoning behind it, but redheaded participants in a 2003 study reported slightly more bruising than the women with darker hair colours. 9. In the Middle Ages, red hair was considered a sign of being a vampire. Tap to play GIF Tap to play GIF HBO Montague Summers, known for the first English translation of the 15th-century witch-hunting manual Malleus Maleficarum also wrote, "Those whose hair is red, of a certain peculiar shade, are unmistakably vampires". 10. And many women were persecuted for witchcraft simply for having red hair. Tap to play GIF Tap to play GIF Walt Disney Pictures While it's difficult to confirm, a lot of sites report more than 45,000 women who were killed for being witches were also redheads. 11. In France, red hair was considered a means to exclude men from priesthood because Judas is often depicted as a redhead. Tap to play GIF Tap to play GIF Fox Searchlight Pictures 12. Bees are apparently more attracted to redheads. Tap to play GIF Tap to play GIF Paramount Pictures This is all anecdotal, and there haven't been widely published studies done on this, but many redheads report bees and wasps are more likely to sting them than those with other hair colours. 13. There was a recipe for "Spanish gold" that required the blood of a redheaded man. Tap to play GIF Tap to play GIF Disney The jury is still out on if the recipe was for an actual paint colour or if it was some kind of alchemical code, as the recipe asks for red copper, basilisk powder, human blood, and vinegar. "The blood, meanwhile, must come from a red-haired man, and must be dried and ground." 14. Evidence was found that indicated Neanderthals carried a variant MC1R gene similar to the modern redhead trait. Tap to play GIF Tap to play GIF BBC2 15. Redheads are less likely to go gray. Tap to play GIF Tap to play GIF Buena Vista Pictures The pigment in red hair stays around much longer than other colours, and instead of going gray, the reddish colour simply fades to a silver-white. 16. They have less hair, but it's thick. Tap to play GIF Tap to play GIF Disney While redheads have fewer individual strands of hair on their heads, the strands themselves are thicker. 17. Blondes may have more fun, but redheads have more sex. Tap to play GIF Tap to play GIF Universal Pictures In 2006, a German sex researcher found redheads reported having more active sex lives than blondes or brunettes.