A little black boy was in the kitchen helping his mother baking...

the kid gets the flour and puts it all over his face and says, 'look momma, I'm a white boy'. His mother slapped him and told him to go to his father and show him what he's done.
So the kid goes to his father and says 'look poppa I'm a white boy'. The father punches him in disgust and sends him to his grandfather to show him whats he's done.
He gets to his grandfather, 'look grandpoppa I'm a white boy'. The grandfather beats the shit out of him.
When he gets back to the kitchen to his mother she asks him what he's learned. He shouts, 'I've only been a white boy for 5 minutes an I already hate you black bastards'

Heard this one years ago, hope it hasn't been on here too often.