Re: What "heterosexual" use to mean
"Sodomites" are in the bible so the concept of homosexuality existed for thousands of years but it was always considered a vile and disgusting thing to mainstream (to the majority which is hetero,) or especially Christian (or most religions.) Anyone homosexual wasn't accepted and had to live in the shadows so they were never given the respect of a classification such as "homosexual" that would require a counter label of "heterosexual." It was just normal or abnormally wrong.
Just in the last 10-20 years we've had a list of new terms gain mainstream acceptance (transexual, tangenered, and others) as those classifications are legitimized.
It's about how society has grown to accept homosexual as something legitimate (whether they agree with it or not) which necessitates and equal label for what was historically considered the only norm.
Personally, I know far too many homosexual, bisexual, and transgendered people (some very good or lifelong friends) to think even the slightest of them. I know they were born or developed that way naturally and to them it is the norm (it's not morbid or a perversion.) All the while I'm 200% heterosexual (and not in a homophobic sense.)