After many years as a seasonal employee, I've developed a keen sense of what actually constitutes good manners while shopping. You probably don't have them. You're rude and annoying and you probably don’t even know it.
It’s important to acknowledge that the idea of “need” is relative: In homes built in the 1950s, bedroom closets were much smaller than they are today. There weren’t emails delivered weekly to your inbox touting sales at your favorite stores.