The document describes different desires that each require certain prerequisites: 1) Eating ice cream and nuts requires having a mouth to swallow and money. 2) Swimming underwater for long periods requires being a skilled swimmer with scuba gear and courage. 3) Drawing intricate art requires being an artist with skillful fingers. 4) Flying like a bird requires having wings like in stories, or being a fairy. 5) Spending time in heaven requires fulfilling duties on Earth through chivalrous deeds.