A Fireman is polishing his fire engine outside the station when he notices a little girl next door in a little red cart with ladders hung on the side and a garden hose tightly coiled in the middle.

The little girl is wearing a firemans helmet and has the cart tied to a dog and a cat, the firefighter decides to walk over and take a closer look.

"Thats a lovely fire engine" he says admiringly.
"Thanks" says the little girl. The Fireman looks closer and notices that the little girl has tied one of the cart's strings to the dog collar and one to the cats testicles.

"Little colleague" says the firefighter, "I dont want to tell you how to run your fire engine, but if you were to tie that rope around the cats collar I think you could go alot faster"

The little girl pauses for a moment, looks at the wagon, at the dog and the cat, then shyly looks into the firemans eyes and says:

"You're probably right, but then I wouldnt have a siren would I"?