Cats are funny little creatures,you love them,think you know them and then......
But that's why cats are mysterious and intriguing.
I keep my litter-boxes in a downstairs bathroom,when we had friends sleeping over downstairs,one of my cats peed AND pooped in our bed(my husbands side
).....They all had a guilty look on their faces...but we don't know who did it and it never happened again.One of them was upset because he couldn't do his business in peace.
I think they need their privacy to go the bathroom,just like us...