Weenie Test 
Three 3rd Graders: an Irish kid, an Italian kid and a Black kid, are on the playground at recess. The Irish kid suggests that they play a new game. "Let's see who has the largest weenie," he says. 
"Okay." They all agree. 
The Irish kid pulls down his zipper and whips it out. 
"That's nothing," says the Italian kid. He whips his out, and proudly shows that his is at least an inch longer. 
Not to be outdone, the Black kid whips his out. It is by far, not only the biggest, but the fattest. 
That night, eating dinner at home, the Black kid's mother asks him what he did at school today. 
"Oh, we worked on a science project, had a math test, and read out loud from a new book, and then during recess, my friends and I played a new game called 'Let's see who has the largest weenie." 
"What kind of game is that, honey?" asks the mother. 
"Well, me, Anthony and Patrick each pulled out our weenies, and I had the biggest! The other kids say it's because I'm Black. Is that true?” 
"No, Leroy. It's because you're eighteen."