In alaska, I saw many eskimo guys with very large dicks. Human 'oosiks'. I think its dietary related. The largest dick I saw was on a white guy up there, and he grew up on traditional eskimo food. Walrus meat was his favorite food. I have the theory that he must have been getting a lot of zinc, and essential fatty acids during favorable times in developement. Walrus largely eat clams, oysters, snails, and the like. I don't know if there is much info on this, but I would assume that would make walrus meat high in zinc, and perhaps unknown associated factors. Traditional eskimo culture was also very accepting of all bodily functions, including sexuality. I think cultural aspects of penis size is overlooked. If you are constantly trying to supress sexual impulses, or other facts of life, that has got to have an impact on how you develop physically. For example, I remember during grade school watching some of my class mates in the 5th grade hunching down in their desk, with both hands pressing down on their dicks, trying to supress an erection. Other students noticed this, and new exactly what he was doing.