A boy and his dad are driving in a car, along with the boy's pet duck. Their car breaks down, and the father sends the boy into town to see if he can get help, in exchange for the duck.
The boy walks to town with the duck and knocks at the first house he sees. A prostitute opens the door.
"Excuse me, but my dad's car broke down. What will you give me for this duck?"
The prostitute takes a look at the duck, and then says, "I'll have sex with you."
The boy agrees. When they finish, the prostitute says, "You were so good, if you have sex with me again I'll give you the duck back."
The boy agrees again. Afterwards, he walks back to the car to tell his dad the good news. As he's crossing the street, a truck comes out of nowhere. The boy jumps out of the way, but the duck is killed. The truck driver climbs out.
"Gee, I'm sorry kid. Tell ya what, I'll give ya $25 for killing your duck." The boy takes the money and heads back to the car.
"So what'd you get, son?" The father asks when the boy climbs back in the car.
"Great!" The son replies. "I got a fuck for a duck, a duck for a fuck, and twenty-five bucks for a fucked-up duck!"