There's this black kid that goes to school and realizes teachers treat him differently than the white kids. So, he goes home, paints himself white and shows his dad.
His dad beats the crud outta him. He shows his mother, "Hey Ma, Look! I'm white!" He gets beat by his mom too. Lastly, he shows his Grandmother, "Grandma, Look! I'm white! She beats him badly with her cane and sends him to his room.
Later, his dad comes into his room and asks, "Son, did you learn anything out of this?" And the boy replies, "Duh! I've only been white for an hour and I already hate three niggers!"