This old man and womam were sitting on the fromt porch in their rocking chairs.
The old man reaches over and grabs the womans breast and says "You know, if
these gave milk, then we could get rid of the cows."

The old woman doesn't say anything, so he moves his hand.
A few minutes later he reaches over again and grabs her pussy. The old man says,
"You know, if that could lay eggs, then we could get rid of the chickens."
The womam doesn't say anything, so he moves his hand.

A few minutes later, the old woman reaches over and grabs his dick and says,
"You know, if this thing worked, then we could get rid of your brother."