A poor farmer has three sheep and one old Ram. As the three sheep are not conceiving the farmer calls in the vet.

Well, you have three options says the vet,a new ram or artificial insemination. "Sounds too costly" said the farmer, "but you said three options?"

"Yes," said the vet, "do it yourself."

The farmer was aghast

"How will I know if it works?"

"Well," said the vet "if they roll around in the mud the morning after you have made love to them then they are not pregnant, however if they roll around in the hay, they are pregnant."

So, the next day the farmer takes the three sheep in his land rover and does the business.

Next morning he calls to his wife "What are the sheep doing love?"

"They are rolling in the mud Jack."

So with a heavy heart he takes the three sheep in his land rover and once again does the business.

Next moring "What are the sheep doing love"

Suspiciuosly she says "They are rolling in the mud jack."

By now exhausted he puts the sheep in to the land rover and does the business.
Next morning "What are the sheep doing love?"

"Well this is very strange," she answers. "Two of them are in the back of the Land Rover and the other one is pipping the horn!!"