A man was walking on the sidewalk and noticed up ahead that Little

Johnny was wearing a red fire man's hat and sitting in a red wagon. It

appeared that the wagon was being pulled slowly by a large Labrador

Retriever. When he got closer to the lad, he noticed that Johnny had a

rope tied around the dog's testicles, which probably accounted for why

the dog was walking so gingerly.

Smiling, he spoke to the little boy, "That's really a nice fire engine

you have there son. But I'll bet the dog would pull you faster if you

tied that rope around his neck."

"Yeah," Johnny replied, "but then I wouldn't have a siren."