Dean Martin and Jerry Lewis were together in a total of 17 comedy movies from 1949 to starring in 14 of those. -Had Dean stayed with Jerry he never would have realized his own comedic talent. See The Dean Martin Variety Show
Jerry Lewis (born Joseph Horowitz) went into show biz after being expelled from his NJ high school for punching the principle after he made an anti-semitic comment. Had he not shown such courage, we'd have missed a lifetime of laughter.