Interesting:

The study by Hamburg Sex Researcher Professor Dr Werner Habermehl looked at the sex lives of hundreds of German women and compared them with their hair colour.

He said: “The sex lives of women with red hair were clearly more active than those with other hair colour, with more partners and having sex more often than the average. The research shows that the fiery redhead certainly lives up to her reputation.”

He added that women who dyed their hair red from another colour were signalling they were looking for a partner, and added: “Even women in a fixed relationship are letting their partners know they are unhappy if they dye their hair red. They are saying that they are looking for something better.”