Redhead on LetMeJizz
Rarity does a lot of the heavy lifting, since natural red hair turns up in a tiny slice of people and jumps out instantly in a thumbnail grid. Pale skin, freckles and pink-flushed cheeks read as one package that fans go looking for on purpose. There's also a long-running fantasy that redheads run hotter once the clothes come off, a stereotype these scenes happily play into. The draw ends up being equal parts the look and the promise viewers attach to it.
2K redhead videos here, all HD and all free. New ones go up daily, so check back if you don't find your scene first time around.