You should be respectful when addressing others.
Kevin is doing door-to-door sales and meets with the police captain at the police station for approval.
Kevin wants to speak to the police captain.
"Kevin calls the police captain, ""captain,"" and treats him as lord and sovereign."
"Kevin calls the police captain ""dude"" and treats him like a regular person."
The police captain gains confidence in Kevin that he'll do no harm and lets him go.
The police captain feels disrespected and refuses to give Kevin permission to go out.