Amazingly, science proved many, many years ago that physical differences between men and woman are actual facts--not myths. The science of genetics, for instance, proves it indisputably. Differences in apparel for men and women merely reflect the proven scientific realities of the genetic differences between the sexes. Do not expect to see maternity gowns for men any time soon, etc...;) However, gowns for big, fat, slobs may look like maternity gowns when worn by men, but I can assure you this is not the case...;)
I don't think anyone at any point in this thread ever mentioned having problems with attire taking a form that follows biological needs of sexes. If you want to prove that every difference mentioned in this thread serves an important function from a bioloical point of view however, I am all ears. lul