clipped from: www.dirtyjokesinc.com   
Little Johnny came home from school one day and said to his father, "Dad, what can you tell me about politics? I have to learn about it for school tomorrow."

The father thought some and said, "Okay, son, the best way I can describe politics is to use an analogy. Let’s say that I’m capitalism because I’m the breadwinner. Your mother will be government because she controls everything, our maid will be the working class because she works for us, you will be the people because you answer to us, and your baby brother will be the future. Does that help any?"

Little Johnny said, "Well, Dad, I don’t know, but I’ll think about what you said."

Later that night, after everyone had gone to bed, Johnny was woken up by his brother’s crying. Upon further investigation, he found a dirty diaper.