David M., 44, requested a fresh receiving address on Thursday, received one instantly, and then — by force of pure habit — pasted in the same address he has been handing out since 2019.

That 2019 address, now visible to anyone who cares to look, has received birthday money, a tax refund, and a reimbursement for a kayak, all on one public line — like a man using a single envelope for every letter he has ever been sent, then leaving it open on the porch.

"It's easier," David explained, of a thing identical in difficulty. The assistant had offered him a clean address. He waved at it the way one waves at a seatbelt.

A new address costs nothing and reveals nothing. The old one, by now, reveals everything.