Some years ago, Mark Twain was a guest of honor at an opera box-party given by a prominent member of New York society. The hostess had been particularly talkative all during the performance - to Mr. Clemens's increasing irritation.
Toward the end of the opera, she turned to him and said gushingly:
"Oh, my dear Mr. Clemens, I do so want you to be with us next Friday evening. I'm certain you will like it the opera will be 'Tosca.'"
"Charmed, I'm sure," replied Clemens. "I've never heard you in that."