well, personally I am white and very large and thick in size and I have noticed that black men are generally bigger, but that's just what i've seen first hand. i've seen roughly 40 different black men naked, most of them in the showers and changing room, and almost all of them were extremely well hung. once they're naked in the locker room, anyone who's small immediately has a shamed look on his face because he knows the guy is really large. the ones at my gym really like to show it off, so most of the time they're in the changing room or shower, and if you look down you'll notice a very large penis on almost all of them. in an earlier post I mentioned this one black guy that works out at my gym who is literally hung about 11" soft , he's tall, built, extremely hung and uncut. it looks like they amputated a horse and put it on him, it's honestly that big. one of my good friends is black and I was working out with him, his older brother, his older cousin and his dad, afterwards we hit the showers together and I immediately noticed their sizes. hahaha, let me tell you, it runs in the family, my friends dad and his cousins had very very large penises, i'm gonna guess his dad was around my length soft so like 9", his cousins looked about 8" soft and very thick, and my friend is about 8" soft as well, I wasn't really surprised but it was hard to keep from staring at them. I remember this one guy walked in to shower and he looked at all of us and turned his back. it was as if all the rhino's escaped the zoo and went to that shower.
It may be a stereotype to say black men have large penises but from what i've seen they were all hung big. even in high school, the few black guys we had at that school we're very large and thick and very popular with the girls.