“A lady is a woman who makes a man behave like a gentleman.”
"The Part-Time Lady," http://books.google.com/books?id=0qhKAAAAMAAJ&q=%22A+lady+is+a+woman+who+makes+a+man+behave+like+a+gentleman%22&pg=PA104#v=onepage A Surfeit of Honey (1957)
Russell Lynes was an American art historian, photographer, author and managing editor of Harper's Magazine. Wikipedia
“A lady is a woman who makes a man behave like a gentleman.”
"The Part-Time Lady," http://books.google.com/books?id=0qhKAAAAMAAJ&q=%22A+lady+is+a+woman+who+makes+a+man+behave+like+a+gentleman%22&pg=PA104#v=onepage A Surfeit of Honey (1957)