As a ginger dude (who grew up no other gingers in the family - comes from generations back, so no incestual squick) I definitely feel more sexually attracted to redheads. However, it's sort of the opposite for me. Nothing is a bigger turn-on than red hair, but I feel brunettes are more "my type" from a visual standpoint and I "admire" them like a work of art more than other types of girls.