HAMBURG, GERMANY —Dr. Werner Habermehl of the Hamburg Medical Research Institute has examined the sex lives of hundreds of German women and compared his findings to their hair color, specifically red, blonde, and brunette.His conclusion? Redheads have more sex than blondes or brunettes.

“The sex lives of women with red hair were clearly more active than those with other hair color, with more partners and having sex more often than the average,” Habermehl told the London Daily Mail. “The research shows that the fiery redhead certainly lives up to her reputation.”

And if the red hair comes from a bottle, rather than nature? It is a signal to ramp up the fucking, the good doctor said.

“Even women in a fixed relationship are letting their partners know they are unhappy if they dye their hair red,” Habermehl said. “They are saying that they are looking for something better.”