My dad told me long ago:
I sleep, I say something. The night. Somebody was washing water in the toilet. My daughter probably went. Then washed twice. Drink three times. Then I remembered that my daughter is not at home, my grandmother is sleeping. My wife sleeps next to me. There is no one else in the apartment.
I went to the toilet. I go in and there the cat is sitting on the barrel. She raises the towel and looks at the water.
This is the fun of the cat at night!