He should be tested for Neanderthal DNA.
All non-Africans are part Neanderthal:
http://news.discovery.com/human/genetics-neanderthal-110718.htmAlthough practically EVERY African-American has non-African DNA
Percentages of Neanderthal DNA vary among non-Africans..like 1-3 percent neanderthal.
However, collectively that various 1-3% adds up to 20% of Neanderthal characteristics are in and even visible in non-Africans.
Neanderthals actually had larger brains than modern humans but have been misaligned in movies, etc...
All getbiggers should be tested to discover their possible Neanderthal ancestry.