PB came from a peculiar family. His siblings included an elephant, an owl, an orca, a duck, two monkeys, a chicken, a snake, a dinosaur, and a snowman. They sometimes went on strange adventures, though mostly they lazed around telling funny stories to each other. He often suspected they were figments of his imagination, but he heard their voices even as he pretended to ignore them.
He decided he wanted to understand how he came to be part of such a family so PB hired a private detective.
He was unsurprised when the detective informed him that he was adopted.