One which knows how to use the human toilet,
and one which falls into it while fooling around.
and one which falls into it while fooling around.

This photo credit belongs to Karawynn Long, URL below.
Blackie checking out the human litter box.
Hmmm.....plants.....munching time......
Credits:
First photo on the top belongs to Karawynn Long at http://www.google.com.my/imgres?imgurl=http://www.karawynn.net/mishacat/photos/mtoiletfront.jpg&imgrefurl=http://www.karawynn.net/mishacat/toilet.shtml&h=340&w=240&sz=9&tbnid=HOit16QizA0J::&tbnh=119&tbnw=84&prev=/images%3Fq%3Dcat%2Bon%2Btoilet&sa=X&oi=image_result&resnum=3&ct=image&cd=1