Anyone looking for an explanation for Perry’s obsession with fantastical, cartoonish trappings will find it in her and her siblings’ description of their upbringing, traveling with their Pentecostal-minister parents. Girlhood-staple stories like “Alice in Wonderland” and “The Wizard of Oz” were prohibited for being “satanic” — as was the consumption of Lucky Charms (the most pagan of the breakfast cereals, apparently).