Intriguing... mmmm.... inside the lavatory

When I first came across the big white water bowl I was a kitten. Naturally I jumped on the edge to investigate, then fell in and had to be pulled out by Celia. After that she kept the lid down. Later, when I was a teenager I jumped in again just to see what happened and jumped out by myself. Something about the big white bowl always intrigues me.
Of course, now I know it is a litter tray rather than a drinking fountain. Humans only put their head in it after a very late night. Most of the time they are well trained to use it for both pee and poo. Strangely, the species uses water instead of sand, though I am told in desert areas they sensibly use sand instead of water. Better for the environment, of course. Humans could, if they chose, turn round, have a good look, sniff and cover it up. In Germany, apparently humans do some of this. They make a deposit on a sort of shelf, turn round, take a good look, and even sniff a bit before pulling the chain. In the UK they tend just to deposit and flush.
It's the flushing bit that intrigues me. You see the deposit disappearing down a hole, propelled by a whoosh of water. Not unlike a mouse disappearing down a hole, only mice don't need water. I can't resist watching it. I'd like to do a bit of research into the earlier part of this procedure but humans get embarassed if you try to see what is going on by putting your head down the loo between their legs. I suppose that's instinct. They choose seclusion (not unlike us) for evacuating their bowels. Probably goes back to the days when they were prey for large felines like lions. I mean when you are defecating you are unable to run away.
I am not a lion or even a black panther. But at heart I am a feline hunter. Maybe Celia and Ronnie have an ancestral fear when I lurk round their litter bowl as they are on it.