You can blame my cousin Gloria for this one.  She sent it to me and I couldn’t resist posting it.  My apologies to the author but it came without a credit.

A  firefighter was working on the engine outside the Station, when he  noticed a  little girl nearby in a little red wagon with little ladders hung off  the sides and a  garden hose tightly coiled in the middle.

The girl was  wearing a firefighter’s helmet. 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 girl replied.

The  firefighter looked a little closer.  The 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 think you  could go faster.

The  little girl replied thoughtfully, ‘You’re probably right,  but then I wouldn’t have a siren.’