A man from the Internal Revenue Service knocks on a door and it is opened by a little boy. The man asks the boy, “Where is your mother?”
The boy states, “She’s in the backyard, screwing the goat.”
The man exclaims, “Son, it’s not nice to make up stories like that!”
The boy says, “Come on in and I’ll show you.”
So the taxman follows the little boy to the back of the house and looks out the window into the backyard. There, he sees a woman screwing a goat. Disgusted, he turns to the boy and says, “That is gross! Doesn’t that bother you?”
The little boy answers, “Naaaaaaaaah!”

?? huh

That's horrible!