Black means any ethnic group with dark skin. Includes African-Americans, Africans, Indians and etc.
Especially African-Americans are renowned for their athletic ability, musical ability, stealing ability and their huge dong.
1.Black guy: (to Indian guy) "You are not Black. You are Asian."
Asian guy: (to Indian guy) "You are not Asian. You are Black."
Conclusion: Indians are neither Black nor Asian.
2.White kid: (to Black guy) "You are black."
Black guy: "Ermm... actually I'm half black."
White kid: "Half black?"
Black guy: "Yes. I'm half black and half white"
White kid: "Oh... Then i'm only half scared."
Black guy: "..."