My kitty "Dax" has a thing for flowing water. She simply refuses to drink from her water bowl and instead drives me nuts every time I turn on a faucet in the house. Any faucet.
She crawls in the bathroom sink and waits....She stands on the edge of the bathtub staring at the handle...she sits on the edge of the kitchen sink. There are times when I wish she would just turn the faucet on by herself, especially since I truly believe that she knows exactly how to do it.
Apparently there is a strong evolutionary advantage to this behavior, including lowered risk of waterborne diseases. Some say the cooler temperate of tap water is attractive, others say it's about not having to bump whisker on the side of the bowl.
Either way, it's a hilarious photo opportunity!