I would say the habit of not needing to trust the waiter with our cards means that when we're in a situation where we have to, it's very uncomfortable. Just lik

I would say the habit of not needing to trust the waiter with our cards means that when we're in a situation where we have to, it's very uncomfortable. Just like I would feel very uncomfortable giving my passwords to a coworker, even though I generally trust them not to abuse it. There's a strong sense of inappropriateness.