This is also what I thought initially, because the OP mentioned "tranny." I think they are women though, however, I heard from a source who was in the Victoria Secret modeling scene in the 70's-80's that a lot of their models were actually men who had their bodies altered (Adam apples shaved, ribs removed, etc.). I don't know how true this is, but I cannot discredit my source's experience, and he seems like a reliable source based on his general based-ness view of life.