Maybe I shouldn't have.
But when a month or so ago I noticed the biometric scanner as I stood in line at the grocery store, I played along and, as the cashier scanned my purchases, I scanned my hand.
"I haven't actually seen anyone do that yet," she told me in a neutral tone which I read as a mixture of impressed and dubious. "They just installed those this morning."
I laughed and completed my purchase the old-fashioned way, tapping my smartwatch on the reader, and then went on my way.
Heidi was with me yesterday when I returned to the store for the first time since then. "What are you doing?" she asked as I raised and lowered my palm over the small rectangle at the end of the belt.
"Paying for the groceries, I think," I answered, and just then a small chime let me know I was correct. The cashier did not react at all as she handed us our bags, and I assumed the novelty of the system had worn off among the employees.
On the escalator back to the garage, I remembered that I had run back to the car when we first got there because I'd forgotten my phone and its magnetic wallet, and I considered a day when all anyone would need to shop was the swirls on their skin.
It was kind of cool, but a little terrifying, too.
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