We have always had cats in the family.  Siamese was pretty much the most popular.

For a number of years my mom had a Flame Point Siamese by the name of Bootsie who finally succumbed to old age.

Everyone has a cat story and I think this one stands out:

Jennifer and Jim kept getting huge water bills.

They knew beyond a doubt that the bills weren't representative of their actual usage,
and no matter how they tried to conserve, the high bills continued. 

Although they could see nothing wrong, they had everything checked for leaks or problems:
first the water meter, then outdoor pipes, indoor pipes, underground pipes, faucets, toilets,
washer, ice maker,etc. all to no avail. 
One day Jim was sick and stayed home in bed, but kept hearing water running downstairs. 
He finally tore himself from his sick bed to investigate, and stumbled onto the cause
of such high water bills. 

Apparently this was happening all day long when they were not at home. 

Knowing that few would believe him, he taped a segment of the 'problem' for posterity -- see attached video.

Reminds me of Adolph, my first cat, except that he took it a step further.  

If you failed to keep the bathroom door shut, your home was more than likely decorated with toilet paper when you got home.

The rotten cat would strip the roll, bunch it up in wads and then run with until the TP broke and then start all over again.

Almost as much fun as attacking water bubbles in an unmade water bed.