I misread/misunderstood this chart when I only glanced at it earlier. Please disregard my previous post.

I don't know of any actual studies on this issue, but this is certainly garbage. There have been a few off the wall, if you will, studies. I think Playboy did one in the 80s to compare American Whites to American Blacks. They found that, yes indeed, Blacks are larger. The average difference 1/4 of an inch when erect; 1/2 inch when flaccid. So, Blacks usually hang bigger. When erect the differences is only 1/4 of an inch. A lot of fuss over virtually nothing. By the way, one look at this chart and you know it's BS… Asians bigger than Whites??????