Human beings are incorrigibly restless and dissatisfied, always in search of new experiences and sensations, seldom content with the familiar. . as for tasting other people's cones, never do it. the reasoning here is that if it tastes good, you'll wish you had it; if it tastes bad, you'll have had a taste of something that tastes bad; if it doesn't taste either good or bad, then you won't have missed anything. what is the main idea of this passage from "how to eat an ice-cream cone"?