至 Paco1964 :French Knickers are called that because they have aa very loose leg that has no elastic to keep hem tight against ther thigh. They were very popular in the Flapper era of the thirties. There are other reasons too, but I'll leave that to your imagination.
Such elegance. Shapely legs encased in sheer dark nylons and a transparent panty where you could see her hairless belly. Peeing in her panties would put an exclamation point on this video.