There was this shepherd who had this whole flock of female sheep.
He wanted to get the sheep pregnant so that he could increase his
stock. But he was too poor to buy a male sheep. So, he figured the
only thing he could do was to get the sheep pregnant himself. So
one morning the man loaded up all the sheep into his truck, and drove
them over to barn where nobody could see him. He screwed each sheep
and then loaded them back in the truck and brought them back to the
pasture near his house. The Shepard went to bed that night after a
long days work. The next morning he woke up, and looked out the
bedroom window expecting all the sheep to be laying down on their
sides, because that is what the sheep do when they are pregnant.
But, all the sheep were still standing. The guys, like "What the
fuck?" and he gets up, loads the sheep back into the truck, takes
them to the barn and tries to get them impregnated.
He wakes up the next morning, he looks out the window and sees
that the sheep are all standing up. So, he loads them in the truck,
takes them in the barn and fucks them all, yet again.

The next morning, the Shepard is so exhausted by his work, he
asks his wife to look out the window and look at the sheep. She does
this and he asks her if they are laying down on their sides? She
says,
"No, but they are all in the truck, and one is honking the horn!"