A gentleman is any man who wouldnt hit a woman with his hat on. – Fred A. Allen

He was the product of an English public school and university. He was, moreover, a modern product of those seats of athletic exercise. He had little education and highly developed muscles — that is to say, he was no scholar, but essentially a gentleman. – H. Seton Merriman

It is almost the definition of a gentleman to say that he is one who never inflicts pain. – Cardinal J. Newman