It's not for storing money!
After using something for a couple decades, you'd think you would know everything about it. For example, how many people know that the hole in elevator doors are a special keyhole for emergency workers, or that the hole in pen caps are designed to not block a child's airway, in
Why do underwear briefs have pockets? - Quora
What's the Pocket in Women's Underwear For?
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pocket in female underwear for Sale,Up To OFF72%
Why are there sometimes pockets in panties? - Quora
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