"Regardless of sex", help me understand how the female and male forms are aesthetically indistinct.

This reminds me of a lot of discussions regarding Superhero costumes, specifically a comic showing what the male equivalent of Power Girl's costume would look like, but instead of picking an example from the myriad of titillating male hero costumes they move the cleavage down toward his groin and call it a day. Is that the male equivalent of decolletage? Or do we judge them by differently?