Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), known by the pen name Mark Twain, was an American writer, humorist, and essayist. He was praised as the "greatest humorist the United States has produced," with William Faulkner calling him "the father of American literature." Twain's novels include The...
Man is distinguished from all other creatures by the faculty of laughter.
You cannot be mad at somebody who makes you laugh - it's as simple as that.