The lifeguard told the mother to make her young son stop urinating in the pool.
"Everyone knows," - the mother lectured him, "that from time to time, young children will urinate in a pool."
"Oh really?" said the lifeguard, "from the diving board!?!?"
A cat will clean itself with paw and tongue after a dangerous experience or when it has fought with another cat. This is an attempt by the animal to soothe its nerves by doing something natural and instinctive.