Red hair is a very rate occurrence as it happens naturally in 1–2% of the human population.
hmm interesting. I like redheaded girls so much. maybe that's why. does having red hair come with anything else?
Well, they ones you like probably dyed their hair,  unless they are northern or western European ancestry and it's just 2–6% 
I can spot a natural redhead anywhere because I have xray vision. where did red hair come from originally?
The scientific explanation for it is that two copies of a recessive allele on chromosome 16  produces an altered version of the MC1R protein