It's not just models, super or otherwise; watch any wiggly woman (probably, you'll have to find one in a movie or on TV, since, as you rightly observe, most gals are wiggle free when they walk), and you'll see what I mean.
I only harp on this because it was a lightbulb moment for me when I finally understood that wiggling is an acquired, not innate, trait.
And I agree that the beards were dumb. Just like fashion.