There have been fairies and tom boys for all of creation, but until recently they had the common sense to realize that their anatomy and physiology is what made them a man or a woman, not how they "felt."  What does it mean to feel like a man?  It feels like you have an extra appendage between your legs that women don't have.

Moreover, until recent history, those with feelings that made them lust after the same sex figured out that they could love a person of the opposite sex, get married, have kids, and live happy lives.  All religions and cultures of the world recognized that this was the intention of God or evolution, or was just about as obvious as could be.  The first passages of the Bible affirm it.

There is nothing new discovered about varying characteristics of men and women.  the question is why do so many believe that all religions and cultures should bend to these bizarre new perspectives?