New concept or put it in the current movie past?

There were a group of humans living underground, a predecessor of our current inhabitants and it was the time when genetic engineering and cloning for designer beings began to reduce the reproductive organs until they disappeared from the species completely. For current members of the species there is no distinguishable gender variation. In those times the fashion became very nostalgic of the old days of wild animalistic sex. Short dresses for lack of a better description were worn by the genders and what ever you possessed was exposed at all times and this was the norm. The sex organs were completely demystified as the race prepared to lose them completely with greater frequency generationally as the current logarithmic curve suggested.