When two grown women titter in French (oui, oui, it&rsquos possible to titter in French), there&rsquos usually a good reason...even when the said women are lodged on a thin-aired Alpine ridge, where jokes that would have fallen flat at sea level are inexplicably buoyed by the rather low oxygen levels at 5,000ft. So I lurch ahead &mdash tied to a pair of battered skis and screaming thighs &mdash only to land in the middle of a how-many-ski-instructors-does-it-take-to-screw-a-light-bulb joke. None, as it turns out &lsquobecause French ski instructors don&rsquot screw light bulbs, dummy, they screw bored, rich housewives&rsquo. Hardly original. And certainly not politically savvy here in Simone de Beauvoir&rsquos backyard.