LOL, one more white who's jealous of Black man. DUDE Black man have Bigger dicks then you White people live with it. I'm Black Myself and I have a huge BBC , every white woman that I hookup with have told me that My Penis is way bigger then White guys.
There's alot of problems with studies like this. The biggest one being how much of race is a social construct. What is considered "White" and "Black" changes depending on what part of the world you're in and has changed over time as well. Plus these studies go off of how people self identify that's not useful science. As an example in Genome studies Black Americans on average have 20% European ancestry! Where as black Africans have something like 0.3% we might as well be a different race but in the western world we are all considered "Black". As an example Barack Obama was the first black president even though his mother was white. Why was he not considered the 44th white president? Now trying to get a difference in penis size on these boundaries that are largely not biological you can see how much of a mess this is.