"not even the majority of the population" is debatable, as always using the example of my country, the vision is very polarized by almost 50/50. But the answer to your question runs the other way. Really throughout the conversation you were talking to a man who is starting the process of becoming a woman. What I believe is that the human being was not created with an intention, or at least, we have not discovered it yet, to exemplify what I say I can tell you about Homosexual people, Simon LeVay's studies show that the brain of the people have certain differences depending on sexual orientation, in other words, a person does not choose what attracts him and therefore, your statement of "Man mates with woman, have child, etc" is wrong. And even if that were the "obedient" of life, what do I care if not everyone follows? that is, in life we do many things that are not natural, what do I care if another does not do what I do?