It must suck to be him.
I don't think it's possible for him to ever go balls deep with a girl; he always has to stay several inches away.
This is result from 24 videos I've watched of Mandingo's.
(12 black chicks and 12 white chicks).
3 chicks have managed to take him balls deep, 11 chicks have come within approximately 1" of doing so, 4 chicks have come within approximately 2" of doing so, and 6 chicks within approximately 3" of doing so. Overall he is able to go deeper into the black chicks before bottoming out.
When deepest -------------black ---------------white
0" of penis showing--------2 chicks-------------1 chick
1" of penis showing--------7 chicks-------------4 chicks
2" of penis showing--------3 chicks-------------1 chick
3" of penis showing--------0 chicks-------------6 chicks