A journalist was interviewing 100 penguins what they did everyday. The first penguin said: "eating, sleeping, and beating up doudou." The scond said the same thing. And the third, the fourth, all the way to the 99th said the same thing. But the 100th only said:"eating and sleeping". The journalist asked why it didn't beat up doudou. The 100th penguin said:"I am doudou myself."