A cowboy gets pulled over by a state trooper for speeding. The trooper started lecturing the cowboy about his speeding, in general began to throw his weight around trying to make the cowboy feel uncomfortable. Finally, the trooper got around to writing out the ticket, as he was doing this he kept swatting at some flies that kept flying around his head.

The cowboy sez, Y'all havin' some trouble with the circle flies? The trooper stopped writing the ticket and said, "well yeah, if that's what there called. But I never heard of no circle flies". "Well, sir" the cowboys sez, "circle flies hang around ranches.

They're called circle flies because they are almost always found flyin' around the ass end of horses". The trooper says, "oh" and goes back to writing the ticket. But, a moment later he stops and says, "Are you callin' me a horse's ass?" "No sir" the cowboy sez, "I have to much respect for law enforcement to call y'all a horse's ass"! "That's a good thing", the trooper says and goes back to writing the ticket. After a long pause, the cowboy in his best texas drawl sez, "hard foolin' them flies though"!!