There has been extensive research across races in regard to penis size. Color of skin does not have anything to do with penis size, it's genetics. There are men of different races with big dicks. I am sure someone has done a study where all the sizes are put into a bell shaped curve. Here is just one google search of a story...
Finally, a study which may lay to rest some of the lingering fallacies about penis size and alleviate the woes shared by many men worldwide. According to n
www.iflscience.com
What I found interesting was that only 5 men out of every 100 (sample size of 15,000) have a bigger tool than 6.3 inches! I am white and my dick is a little over 8, so I am packing!
I still want to see my wife with a 10" BBC however!!