An insect repellent salesman approached a farmer, hoping to sell his product.
The farmer declined, stating he hadn't seen any bugs on his farm for years. The salesman pleaded, explaining he had a wife and four children and desperately needed the money.
Feeling sympathetic but confident, the farmer made an unusual offer: "I'm so sure there are no insects here that if you strip naked and let me tie you to the barnyard fence all night, I'll buy every can you have if you get even one bite by morning."
The salesman, overjoyed, readily agreed. That night, the farmer secured the naked man to the fence and retired. Throughout the night, he heard the salesman moaning and groaning.
However, the next morning, the salesman had not a single insect bite. Puzzled, the farmer asked about the noises.
"That was the worst night of my life," the salesman replied. "Doesn't that damn calf have a mother?"