Relationship Banking
  
It's when that purple dinosaur Barney comes a-callin' with his briefcase and sings, "I like you...you like me...we're a happy family..." He trusts you. You trust him. So you borrow from him, presuming that he'll give you a square deal, that he will be cooperative (should things ever go awry), and that he'll keep his mouth shut about pretty much everything you do. You're a good ol' boy. He's the same. You bank with him because you like him, and trust him.
That's how banking worked 100 years ago. And, to some extent, it's how it works today. And everything is just handshakes and backslaps and showing up for Grandpappy's funeral, and it's all good...until Barney gets hungry and eats you.