What did animals ever do to whomever it was who thought to start that? If someone "swims like a fish" that's a compliment I guess. Calling a human a shark? Compliment or insult? Some humans breed like rabbits. Some are as hard to get rid of as cockroaches. The elephant in the room is never about something good. Being compared to a bull...bully/bullsh**? Not so hot is it? Snakes poison, tigers maul. And so it goes. Why is this what humans do? D'ya think the animals use us to insult one another? Girlyman is a particular favorite perhaps? SIGH.