It's the middle of summer and a Highway Patrolman pulls over a motorist
for speeding. While he's writing the ticket, flies keep buzzing around
his head, annoying him considerably.
"Circle flies sure are bad this year, aren't they?" says the motorist.
"Yeah," says the patrolman, "if that's what these are, you're sure
right. But I've never heard of a circle fly before. What's that?"
"Well," the motorist responds, "circle flies are a species of fly that
are particularly partial to horses. Specifically, they tend to circle
around a horse's rear end. That's why they call 'em circle flies."
The patrolman, catching the implication, replies, "You don't say. Well,
that's very interesting. But it strikes me that you might be trying to
call me a horse's ass. You wouldn't be making that kind of implication
about an officer of the law, would you?"
"Oh, no sir!" responds the motorist. "No, sir, not at all. I have the
utmost respect for law enforcement officers, and would never dream of
implying that one of them was a horse's ass. No, sir, I'm terribly
sorry if that's how it sounded."
"Yeah, I didn't think so," replied the patrolman.
"Yeah," the motorist continued, "but there's just no fooling those
circle flies, is there?"