A (Second) Question of Etiquette

Let's say that a man is riding on a subway train sitting across from a hot lady who's wearing a skirt so short that her white panties are radiating the glory of womanhood for all to see. Should he be an honorable gentleman and keep his eyes affixed to the clueless tourists seated far away from her, or should he steal a few furtive glances at her every few seconds? The ethical dilemmas that one has to face every day in this city!!