Among the infamous Donner party, women were twice as likely to survive cold and hunger. Comment - ads for such surgery are common in Asian newspapers in Taiwan, Korea, and Japan. There isn't much data on black penis size, and I couldn't find any volunteers, but every data point out there appears to support this impression. That doesn't mean that Rushton's odd theory about evolution is right, or that masculinity can be measured by penis size, but it is an interesting difference. Unfortunately, as mentioned in the introduction, I have limited my analysis to Caucasian and East Asian subjects due to the paucity of data from Black and Hispanic men.
Most sources seem to agree.
In The Bell Curve, Murray and Herrnstein also introduce readers to the work of J. Phillipe Rushton, a Canadian psychologist. Note - I lost my notes, but the only two blacks who responded were much larger than the range for whites or Asians. About ten year or more ago.