Mermaid Roommates

I lived with a girl once who only ever took baths, never showers...which isn't too ridiculously weird, but a little peculiar for a 20 something adult.  Even stranger, was that every time I would use the bathroom after she bathed, the bathroom floor would be covered in half an inch of water. Literally, water everywhere! I couldn't understand it until one day I heard it....I mean, her. She was THRASHING around in the tub. One could only assume she was doing flips or 'playing mermaid' by the amount of water you would hear splashing out of the tub and onto the floor.