The concept of Homosexuality was invented by Western sexologist who wanted to isolate male-male sexual behaviour

"in the late nineteenth and early twentieth centuries was infrequently labeled a 'paedophile'. Of principal concern to sexologists were sexual deviations with respect to the aim or gender of object choice, not the age of object choice."



Note from Reclaiming Natural manhood site:

The concept of Homosexuality was invented by the late nineteenth century Sexologists (sexologists were themselves a new concept invented around that time), who were bent on isolating sodomy as a deviant behaviour. It was through their faulty definitions that the concept of modern Homosexuals and heterosexual came into place.

What happened was that, the act of sodomy was much less practised, at least visibly, in Christian societies, and was easier to isolate as a 'sin' or 'deviant' behaviour that only some males indulge in. Receptive anal sex was in particular acknowledged only by effeminate males who were part of the third gender, who were not considered 'men,' as it was extremely stigmatized for men.

When these 'sexologists' were seeking to isolate sodomy as a deviant behaviour, they misdefined this deviant group not as "males who seek anal sex" but "males who like men." Now, man to man desire as such (and not related with the desire to be anally penetrated) was not considered to be something restricted to a few 'different'/ 'pathological'/ 'effeminate' individuals, but was believed to be a universal phenomena, and not necessarily stigmatized. The only stigmatized acts were sodomy (religiously) and particularly receptive anal sex, which was considered to be extremely unmanly.

It is noteworthy, that the leading 'sexologists' who invented the concepts of 'homosexuality' were members of the third gender who were "women in the bodies of men," rather than the average man who desired men. What is more, they were not even qualified in the emerging field of sexology. Their ideas suited the anti-man agenda which was gaining tremendous ground in the West and they just took to it.

Men and women are not naturally compatible

But what is the new work of marriage like? Do men and women actually want the same things? If not, will they be happy to compromise on what they want? "Sometimes I wonder if men and women really suit each other," said Katharine Hepburn. "Perhaps they should live next door and just visit now and then."

-- excerpted from: The gap between men and women

by  Jane Sullivanreports.

Pressures on straights to be heterosexual

"Compulsory heterosexuality isn’t just about compelling people not to be gay. It’s about the social pressures to perform heterosexuality that are put on everyone, regardless of sexual orientation. Even if you’re straight, you can be subject to this pressure if your straightness doesn’t conform to the get married/have kids/participate in the rituals of American heterosexuality."

-- Amanda Marcotte in Education, Boggles the Mind, Signs of the Non-Apocalypse, Feminism

...

Reproduction no reason to promote heterosexuality

"Food tastes good. It is pleasurable to eat foods one likes. That doesn't necessarily entail being a glutton, just because food is pleasurable to eat.
Food is also far more necessary to sustaining life than sex is. Sex may facilitate procreation, but procreation by itself doesn't put food on the table, or fire in the hearth, or clothing on the body. 
By that same token, sex being pleasurable and the fact that male-female coupling leads to conception does not mean that one should do it endlessly. "

--  Giambatista, an internet discussion poster

"Again I must ask, why does "Be fruitful and multiply" survive as a commandment while most other directives from the Old Testament either get thrown into the trash, or only receive passing mention from most professing Christians?"

--  Giambatista again

Presuming 'heterosexuality' to be majority and male to male desire to be minority

The nature of the problem to be discussed can be indicated by asking whether homosexuality and heterosexuality are biological categories that divide the world into a majority and a minority that can be found in all times and places. To such a question most western people today would reply yes. And while they would probably wonder why a minority should be homosexual, they would simply accept without question that most people are heterosexual. Since the 1970s, however, the work of some historians and sociologists has radically challenged these presumptions.

-- Randolph Trumbach, in the article
The third gender in twentieth-century America
published in:
Journal of Social History, Winter, 1996 by Randolph Trumbach

Greek men and their boy lovers

the moment of the boy’s first stubble is so often conceived in poetry as a time of
great loss, when a beloved boy is suddenly too old to be respectably the object
of a man’s passion, and must be allowed to find a boyfriend of his own.

-- Gregory Woods
A History of Gay Literature: The Male Tradition (New Haven and London,
Yale University Press, 1998), 30.