It's rude to intrude on your friend's private correspondence.
Chad's roommate Bill has been texting back and forth with a girl he met the other night at a party.
Chad wants to know what Bill and the girl are talking about.
Chad asks Bill how he and the girl have been getting along, and what they've been talking about.
Chad finds Bill's phone and begins reading through his text messages with the girl.
Chad maintains trust with his roommate and gets filled in on the story without having to snoop.
Chad invades Bill's privacy and violates the trust between the two roommates.