I don't know if this has been posted. I thought it was funny

While suturing a laceration on the hand of a 70-year-old
Massachusetts farmer whose hand had been caught in a fence
while working his livestock, a doctor and the old man were
talking about Senator John Kerry possibly being in the White House one day.
The old farmer said, "Well, ya know, that Mr. Kerry is what we
call a 'post turtle'." Not knowing what the old man meant, the doctor asked him what a post turtle was.
The old man said, "You know. When you're driving down a country
road and you come across a fence post with a turtle balanced on top, that's a post turtle."
The old man saw a puzzled look on the doctor's face, so he
continued to explain, "You know he didn't get there by himself, he doesn't
belong there, he can't get anything done while he's up there, and you just
want to help the poor stupid idiot get down so he can crawl away...".