A firefighter was working on an engine outside the station when he noticed a little girl in a little red wagon with tiny ladders hanging off the sides. There was even a miniature garden hose tightly coiled in the middle of her wagon. The little girl was wearing a firefighter's helmet, and the wagon was being pulled by her dog and her cat.
The firefighter walked over to take a closer look. "That sure is a nice fire truck" the firefighter said with admiration.
"Thanks", the little girl replied.
The firefighter looked a bit closer. He noticed that the little girl had tied the wagon to her dog's collar and to the cat's testicles....
"Little partner", the firefighter said, "I don't want to tell you how to run your rig, but if you were to tie that rope around the cat's collar, I bet you could go a whole lot faster."
The little girl replied thoughtfully, "You're probably right. But then I wouldn't have a siren!"