"Birth Control" joke

After having their eleventh child, a couple from the country
named Bubba and Mary Sue decided that enough was enough,
(they couldn't afford a larger doublewide). So Bubba went
to his doctor (who also treated mules) and told him that he
and his wife/cousin didn't want to have any more children.
The doctor told him that there was a procedure called a
vasectomy that could fix the problem. The doctor instructed
him to go home, get a cherry bomb, light it, put it in a beer
can, then hold the can up to his ear and count to ten.
Bubba later said to Mary Sue, "I may not be the smartest man,
but I don't see how putting a cherry bomb in a beer can next
to my ear is going to help me." So, the couple drove to
Kentucky to get a second opinion. The physician was just
about to tell them about the procedure for a vasectomy when
he noticed they were from Tennessee. The doctor instead told
the man to go home and get a cherry bomb, light it, place it
in a beer can, hold it up to his ear and count to ten.
Figgerin' that BOTH learned physicians couldn't be wrong, Bubba
went home, lit a cherry bomb and put it in a beer can. He held
the can up to his ear and began to count. "1, 2, 3, 4, 5...",
at which point he paused, placed the beer can between his legs
and resumed counting on his other hand.