On a hot blistering summer day, a redneck cowboy comes riding into town on his horse with his dog following. He tied the horse and dog under the shade of a tree and went into the bar for a cold beer.
About 20 minutes later a policeman comes into the bar and asks who owns the dog tied under the tree. The redneck cowboy said that it was his.
The policeman said, "Your dog seems to be in heat."
The redneck cowboy replies, "No way dog's in heat, he's cool cause I got'im tied under the shade of the tree."
The policeman says, "No! you don't understand; your dog needs to be bred."
No way", the redneck cowboys says, "dog don't need bread, he's not hungry, cause I fed him beef jerky this mornin".
Now the policeman gets mad and yells out; "NO! you don't seem to understand, your dog wants to have sex!"
The redneck cowboy looks at him and says, "Go ahead. I always wanted a police dog!"