Believe it or not, the MC1R genes that cause red hair are also responsible for other physical characteristics that make redheaded sex the best ever. The genes responsible for red hair also cause redheads to respond differently to physical stimuli than men or women with other hair colors. Redheads feel hot and cold temperatures more rapidly and respond to pain differently than blonds or brunettes. This heightened sensitivity can easily translate into exciting sexual play with hot and cold lubes, ice cubes and even sex toys that trigger heightened physical responses. You can only imagine what this might translate to in the bedroom. Redheads exude sexiness from their very pores.
20 Smoldering Redheads Who Really Get Us Fired Up - Maxim
They say red hair may soon become extinct. Redheads have a gene that allows them to create their own vitamin D, whilst non red-haired people are able to create theirs from exposure to sunlight. The effects of global warming heating up the planet means that even the Scots are now getting plenty of ray, thus the need for the redhead gene is in decline. Darwin may argue that this is all fair play, but it comes at a price.