A farmer and his wife were laying in bed one night, the farmer feeling
   a little frisky,
   reaches over and gives his wife's breast a little feel and
   says,"Mother, if this could give
   milk, we could get rid of the cow." His hand then travels down to her
   crotch, and he says,
   "Mother, if this could give eggs, we could get rid of the chickens."
   His wife then reaches
   over and grabs his penis. "Father, if this could stay hard, we could
   get rid of your brother.