It's like calling the crippled kid in class, the "special-needs boy." Rather than Jake, Bob and Timmy, you have Jake, Bob, and that special-needs boy.
Instead of Asians, Whites and Blacks, it goes Asians, Whites and African-Americans. Putting the spotlight on Blacks is a form of racism. It's like parading around a knew toy.
Do you even realize how happy White get when we make a Black friend? Think of the laugh the Pillsbury Doughboy makes in those commercial, that's how White people feel when we make a Black friend. We'll go around, ever so nonchalantly, and just tell random ass people about what our African-American friend can do that they can't.
"Your dick don't get wet when you sit down to shit? Oh yeah well my African-American friend...."
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Go home, you're drunk.