Once or twice a week I add fresh litter to the boxes. Tonight I was feeling rather proud of myself that I'd worked out an efficient method to get the job done. I opened the bucket of litter and set it next to the litter box so I could pour some in as soon as I had finished scooping. So I'm scooping away and Shareena hops up into the bucket and pees on the clean litter. Of course, there wasn't room for her to turn around in the bucket, so she hopped out again then reached up with her paw to very neatly cover her pee.
She must have thought I was trying out a different kind of litter box---again!