Skunks
So there were these 2 young skunks
One was called In and one was called Out and it always seemed to be that when In was out Out was in and when Out was out In was in.
One day their mother told Out to go out and get In in for dinner, he was back within a few seconds, "How did you find him so fast?" the mother asked incredulously,
"It was easy," said Out "In stinked."