Charley likes to wash his bum when we have company, he plonks himself right in the middle of the floor makes sure they are watching then washes away.
The worst time was with Henry towards the end when he wasn't feeling so good and had a little constipation, normally after trying and failing in the trays he would find other places to go. Unfortunatley my landlord was over for rent when he found somewhere else to go and watched him poop on the carpet, I couldn't even shout at him either because I was so happy the lactulose had worked and that he would soon feel better. Luckily he kind of understood once I explained why I was so happy to watch him poo on the floor.