The realisation you misdirected a sensitive message is among the worst feelings technology can induce. Have faith — one day it will be a great anecdote. I accidentally sent a compromising message to the worst person possible!!! Everyone has made this mistake — even the Greatest of All Time. Messages are sent to the wrong recipients all the time, and mostly without consequence. You remember the worst-case scenarios: nudes to a relative; a job application to your current boss. And that classic of the genre: a text unambiguously about someone, to that someone.
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