(CNN) — In days of yore, comedian Steve Martin said he used to try out jokes in clubs and adjust them based on an audience's feedback.
"Today, the process is faster. It's your brain, a button, then millions of reactions," he said on his website.
Martin was writing Monday to explain himself after sending a tweet that, by his own admission, was "unfortunate."
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"To those who were offended, again, I offer a deep, sincere, and humble apology without reservation," he wrote. "But I feel I need to tell you the context and origin of the joke."