The hippo was not born saying "cool beans. I am a hippo." No way, so he tried to paint a stripe on to be like the zebra, but he fooled no one. Then he tried to put a spot on his skin to be like the leopard, but everybody knew that he was a hippo. So, at certain point, he looked himself in the mirror and just said "Hey, I am a hippopotamus, and there is nothing I can do about it." As soon as he accepted this, he lived life happy.
Happy as a hippo.