Bonnie was our original sink cat. She waits in the sink in the morning so I can turn it on and she can drink fresh, running water. We have a whole routine around this. She doesn't like the hairdryer or toothpaste, so when I start to use those, she leaves. With great dignity, of course.
Victor arrived and immediately discovered that investigating the sink makes fresh water appear. Maybe he already knew about it. Anyway, I saw Bonnie watch him drinking from the sink with something almost like respect. "He can't be all bad if he knows where to get the best water." Victor couldn't care less about the hairdryer or toothpaste, as long as he can drink the water.