So this farmer is outside with his wife, he grabs
her breasts and tell her that if he could them to
make milk he could get ride of their cows. 

"Oh," she says. 

He replies, "Yes," and proceeds to grab her 
pussy, and tells her that if he could get it to
make eggs he could get rid of their chickens. 

"Oh," she says again, and then grabs his penis,
saying that if she could get it to grow she
could get rid of his brother.