12 Year Old's Revenge

A 12 year old boy walks into a whorehouse with his dead frog tied on a string.

"Can I help you?" asked the lady up front.

"Are all of your girls clean?" the little boy said.

"Well, all of them are, except for Amber," she replied.

The little boy exclaims that he'll take her. The lady looks at him skeptically as he says "I have the money. I'll pay up front."

The lady let's him go ahead.  When the little boy comes back out again, she is curious.

"Of all the girls in the house, why did you pick Amber?" she wondered.

"Well, my parents are out celebrating their anniversary, so I have my babysitter, Jen. And she just can't resist little boys. So me and her will have some fun.  Then when daddy goes to take her home, they will have some fun, because he likes younger girls. This passes along the STD to my babysitter and my daddy.  When he get's home, he and mommy will have sex, and mommy will get the STD.  Finally, when daddy leaves for work tomorrow morning, mommy will have sex with the mailman, and he'll get the STD."

The lady just stares at him and says, "What is the point of all this?"

"Simple," relies the boy. "The mailman is the bastard that ran over my pet frog."