Its true, race really doesnt have anything to do with it. Testosterone, genetics, petuatary glands, hormones and body structure are the key deciding factors. What you see in films and internet is not always true to base a fact on. Theyre obviously going to show the more well endowed dudes over the not so fortunate ones.
Surprisingly, I also read in numerous articles that Arabs actually have the biggest. And from where I come from, thats a well known fact (Im not arabic).
Anywho, there are too many "Rain Coats" as Wafb said. Durex is garbage. Trojans too gooey. Lifestyles runs out of lube extra fast. So I make sure to get the extra lubed (sometimes warming, cause those are the shit!!)of any kind really. Or I just make sure the girls on like 8 different birth controls and go in without a dummy.