Yes, Wilkie, they do. They are incredibly small. But as we are all friends here, when you stand up to get off the bog, you head butt the door, which invariably flies open into the living room, the locks are little plastic clips.
As for the caravan shower, with my head jammed against one corner, my arse against the other corner diagonally opposite and my knees jammed in the corner below my head, I still couldn't get down to pick up the shower gel off the floor.
If you are less than 6 foot, you might manage it.