Sexiness particularly in movies is the chess game in the 'Thomas Crown Affair'. It's it's I don't know but Faye Dunaway comes up a lot in that thinking. It's the subtlety of sexiness. The moment you try to be sexy then it's not.
How can a doctor judge a woman's sanity by merely bidding her good morning and refusing to hear her pleas for release? Even the sick ones know it is useless to say anything for the answer will be that it is their imagination.