A night at the farmhouse

"A night at the farmhouse"
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The salesman stopped at a farmhouse one evening to ask for room and board for the night. The farmer told him there was no vacant room.
"I could let you sleep with my daughter," the farmer said, "if you promise not to bother her." 
The salesman agreed. After a hearty supper, he was led to the room. He undressed in the dark, slipped into bed, and felt the farmer's daughter at his side. 
The next morning he asked for his bill.
"It'll be just two dollars, since you had to share the bed," the farmer said.
"Your daughter was very cold," the salesman said.
"Yes, I know," said the farmer. "We're going to bury her today."