Cary Grant puts it quite succinctly: from about 0:45: https://www.youtube.com/watch?v=8ANsf2GUT2E&t=66s
Parker and Hart
Mastroianni and Hart
Cary Grant puts it quite succinctly: from about 0:45: https://www.youtube.com/watch?v=8ANsf2GUT2E&t=66s