The Swiss have an ingrained sense of decorum, they don’t need rules to guide their behavior. You never learned what you were supposed to say and when, your sort of just picked it up. Your sense of etiquette comes from an internal sense of what is courteous and what is not. No one has ever accused you of being rude because you naturally treat people the way they would like to be treated. You tend to be horrified by crass and rude people, not understanding how they came out that way. You’ve simply never struggled with being polite, and don’t understand why others do.
Disclaimer: Picture is not mine, all rights belong to the owner.