Why do jeans have that tiny, pointless pocket?

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Historian Explains Why Our Jeans Have Tiny Pockets

What is the Small Pocket on Jeans for? - Hockerty

Small Pocket on Your Pants and Jeans: Here's What It's for

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Here's why your jeans have that tiny front pocket

People are discovering what the tiny pocket on your jeans is for

Why Don't Women's Clothes Have More Pockets? - The New York Times

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Why do our jeans have a tiny pocket just above the front pocket? Was it something useful that was added or is it just a fashion thing? - Quora

Why Do Jeans Have That Tiny Pocket? The Answer Will Blow Your Mind

This Is The Reason Your Jean Pockets Have Tiny Buttons On Them