About 10 minutes into my lunch with mogul/fashion designer/wrap dress inventor/industry chieftain Diane von Furstenberg in the Bar Room of the Four Seasons in New York, DVF, as she is generally known, reaches into her handbag, whips out a small digital camera and takes a picture of my shirt.

This is pre-consommé but post-bread and crudités; pre-Edgar Bronfman, the chief executive of Warner Music Group, coming over to pay his respects but post-wave with Lynn Forrester, the entrepreneur and wife of Sir Evelyn de Rothschild; and mid-discussion of the power of women, which is pretty much the subject of every DVF discussion. Consider, for example, her explanation of the photo-snapping moment, which is probably not the kind of thing that takes place often in this particular restaurant but one that barely raises an eyebrow among our fellow diners.