A traveling salesman whose car has broken down goes to the door of the closest farmhouse. The farmer says, "You can spend the night but you'll have to share a room with my daughter."
The daughter, a gorgeous 20-something, winks at him over her father's shoulder.
"Oh, I don't mind that," exclaims the salesman.
"Just one thing," says the farmer. "No funny business. If you touch her, I'll kill you."
"Oh no sir," says the salesman. "You can count on me!"
Just to be safe, the farmer builds a wall of eggs between the two beds in the daughter's room. To get through, one of them would have to break them. However, In the middle of the night, the salesman can no longer control himself, busts through the eggs and he and the willing farmer's daughter spend some passionate time together. They break all the eggs in the process.
When they're done, they spend the rest of the night piecing the eggs back together one by one and rebuilding the wall. They couldn't get the yolks in so they just glued the shells together and threw away the rest, so there was a wall of empty eggs.
The next morning, the farmer goes to his daughter's room and takes a couple of eggs to the kitchen to make breakfast. However, all the eggs he tries turn out empty. When the salesman wakes up, he goes down and is surprised to find the farmer staring out the window at his chickens, holding a shotgun.
"What are you doing?" asked the man.
The farmer continues to stare. "I think one of my roosters is using a condom."