So this one is very old and I will have to count on my shaky memory.
A travelling salesman is out on one of the back roads and his car breaks down. He has no way of getting it fixed this late and it's cold and he sees a farmhouse down the road. So he heads on down and knocks on the door. The old farmer comes to the door and the salesman explains his plight and just wants to have a warm place to sleep and promises to take care of his car first thing in the morning and be out of the farmers way. The farmer sizes him up a little and says," Okay, you can stay in the back room but I have a 19 yr old grand daughter who has never seen a man besides me. You have to promise not to try anything."
The salesman assures the farmer that he is much too tired and will do nothing inappropriate. Later in the evening, after the salesman has had a shower, he is in his room and removes his towel. He turns around and the young lady is standing there staring at him. She points at his penis and asks,"What is that thing?"
He answers her, "Well, miss, that is my chicken."
She says,"May I touch it?"
The salesman thinks back to his promise but being a man, of course figures, what the hell and agrees to let her touch him.
Several minutes later, the farmer is sitting in his chair smoking his pipe and hears blood curdling screams coming from the back room. He jumps up and gets back just in time to see the naked salesman running out the back door with flames shooting up from his crotch.
He sees his grand daughter standing there and asks her what happened.
She says," Well Poppa, he was standing there and said I could pet his chicken. Before I knew it, that damn chicken jumped up and spit some God awful stuff at me so I figured it was defective or something and I broke its neck, smashed both its eggs and lit its nest on fire."

