One of my cats, Caramel rushes into the bathroom everytime the water runs, even if it is in the sink for a drink. He sticks his paws in it and then takes a sip of the water coming out of the tap. He waits till Im done taking a bath and then when I rinse out the tub he licks the tub dry I don't know why he does it because as you said I always put freshwater for him put I guess it is just for a change. My other cat, Coco that goes outside always drinks out of puddles and the water that trickles out of the fountains. It is so cute. Caramel even drinks out of glasses of water if you leave them around. He sticks his face in and licks and sometimes he knocks the glass over lol! I love them anyways though. Just becareful though to make sure your cat doesnt drink any bath product or cleaner and it should be ok as long as you dont mind them doing it