Dave has yet to get in the shower with me but does play in the bathroom while I'm in there, occasionally asking how much longer I'm going to be.
He is also surgically attached to my ankles when I'm wandering about the flat, sits in the shower (which is next to the loo), while I'm doing my business, then once I flush, sticks his head in the bowl to watch. He is also partial to climbing into the toilet, heaven knows why, found little blue paw prints all over the loo seat one day from him climbing in when I had the loo bleach on it. That'll teach me to not put the lid down when doing the housework! At least I knew his feet were clean that day.