Brand Loyalty
At their most successful, brands create an identity that brainwashes, er, resonates so strongly with consumers that they will make purchases exclusively based on branding.
When Milo goes shopping for beer, he has dozens of labels to choose from. However, it is his desire to emulate being the most interesting man in the world that reigns supreme in his thought process, making him buy Dos Equis rather than any of the superior craft offerings on the shelf. Stay brand loyal, my friends.