I remember a time when it was called the "10 foot rule." You tried to work your look so that from ten feet someone couldn't tell. I think the realization has set in that actions speak as loud as looks. While I could pose for a picture that looks very feminine, if I look at a video, I see far more flaws in the presentation.
As some have pointed out, to pass as feminine can mean to go unobserved, which requires not drawing attention. Short hem lines, patterned hose, and jiggling bobs tend to draw attention, while jeans, sneakers, loose tops blend in more -- flying low under radar.
