Are you a card-carrying member of the cool kids with cards club?

Riffling through someone else’s wallet combines voyeuristic delight with the thrill of playing a lottery. Leafing through the contents, fingers trembling in taboo anticipation, one wonders, “Who was this person, who passed this street before me? And just how much cash were they carrying?” Outdated ID photos, taken once at the onset of adulthood, nestle among coupons, receipts, and membership cards. A stranger’s wallet offers a tiny snapshot of their habits, and we flip through it out of curiosity as much as for the chance to lift a rumpled fold of bills.

In this sense, a wallet symbolizes identity beyond literal documents of identification. But that’s boring. Let’s treat the contents of your wallet with the same frivolity as trading cards: we’re swapping the extremely personal with the extremely interchangeable.

Whenever you find a wallet on the street, think “What did I get!?” and “This could be me!”