I wanted to get one of those fountains for our kitties, who just won't drink out of their own bowls, but my husband said "Oh for God's sake, they lick their own asses! Why do they need filtered water??" I had to admit he had a point.
ROFLMAO! Indeed they do. And why do they do that? Because they can!
Still, I eventually want to get at least one of those fountains for my pair of cats.
A male cat, who has since crossed that Rainbow Bridge, would sometimes drink from the toilet bowl and also from a dripping faucet.