Trying to do any kind of redheaded research on the Internet places you (accidentally) smack dab in the middle of that reported 85% of men who regularly/habitually surf porn.
a google image search for redheads (with the "safesearch" option off, of course) brings up tons of results for sites like freckledredheads.com, which is sadly not medical in nature, or the aptly named blowjobs-by-redheads.com. Need I say more?
Safesearch on and all you get are ducks.
what's a boy to do? 
It would seem that people would be more curious about us as individuals since we are like only 2% of the population. Thanks for being a positive voice.