The term Homosexuality fails for loads of reasons e.g. its a contradiction anyway, you can't have 1 sex, there must be at least 2 so its a term that already suggests a problem.
To put that another way suppose all men were magically removed from the world, then everyone would be woman and after we had forgotten about men all together then women would forget they were women--as everyone was the same and there was nothing to say here--then there would be no sex (as a noun). Presumably some technology existed to enable women to make babies with other women otherwise in a generation there would be no humans at all. And the activity of women with women to make babies would only be called "sex" historically. But at some time in the future people would wonder what the origins of this word was as relationships using the apparatus of childbirth no longer involved sexes. the only constant as technology evolves is that 2 copies of the DNA will be needed to make a new human.
So what actual is the issue with Homosexuality (if there is one)? It is Genetical Compatibility isn't it. Sexes come in two types that fit together literally like a lock and key. So sexual relationships work because of genetical compatibility. The problems occur when there is incompatibility. This may be due to same sex attraction, but it can be due to deformity or injury. Heterosexual couples who experience damage to their genitals can be thrown into the problems at Homosexual couples. And if one partner if Transgender then this only becomes a problem if the transgender operation changes their genital arrangement.
So rather than focus on "sexual attraction" perhaps we can just ignore this, and make it a medical issue of Genital Compatibility.
One reason for changing the thinking comes from the Law. All parts of the world consider anal-sex a perversion and there are rules against it. Only with liberal changes to law in the West very recently has this changed. Even Buddhism, which is famously about peace and compassion, says that anal-sex is to be avoided. I wonder whether was in termed as "anti-gay" is really just "anti anal sex."
What do the clerics in Qatar say to "homosexual" relationships that exclude the possibility of anal sex? #TODO find out what Muhammad actually said about this.
Anyway pretty sure there are a number of issues here that the LGBT community have crudely just lumped together as prejudice.
But if we focus instead on this issue of Genital Compatibility then we have an actual definable issue. Even homosexuals must find a solution to incompatibility.
Now it is argued that the anus has a lot of unnecessary sensory and pleasure receptors that can only be there is the anus had evolved as a pleasure organ. Indeed why ban something that is unpleasant. We don't need to ban hard work, or standing out in the cold because we are not overly attracted to these things. There must be attraction to anal sex for it to be banned. But on the other hand if its pleasurable then why ban it? It's not like we ban eating good food.
And this raises questions about the nature of pleasure and sexual relationships. Obviously sexual activity evolved from procreation. All the organs and processes have a role to play in pregnancy and conception. But sex plays a much more complex role in human society, especially Modern Western society. But its played a role in religious festivals and entertainment and has a wide presence on cultures around the world. It is clearly more than even binary relationships. Modern post-Christian society still focuses on sex between partners and with the advent of Gay-Marriage the gay community focuses more and more on what they previously termed Conservative and Bigoted: the binary partnership.
Anyway big subject just dumping some ideas.
===
So why the story of Sodom and Gomorrah? What was the deal traditionally with anal sex, well and unrestricted sex?
One theory is disease. The reason for strict traditional sexual structures is to stop the spread of STDs. To back this up is the observation than on Polynesian islands where there was no disease, sailors reported free love. Once Western sailors brought disease naturally the culture changed to stop the spread of disease. You see this in animals. Monogamy in animals can be seen as a way to sto the spread of diseases. Birds who travel far and could produce global pandemics are very often incredibly monogamous sticking with the same partner throughout their life, and even stopping breeding if that partner dies so strong is the instinct **. Obviously there is no moral or religious restriction here, it is what they do without question. This would explain why promiscuous people are viewed as "dirty." They literally may be carrying disease.
** Update 8 Nov 2022 this study suggests that if this is true it is over ridden by the need to mate. Long distance migrants are also more likely to mis-time breeding, and so more likely to change partner.
Another reason analysed at length (and I can't say theory because I don't know if its in the literature but from my own observations and thinking) is that men do not want children with unfaithful women who may bear them someone else's children. This is more than ego, in Capitalist societies men do not want other men laying claim to their capital. But genetically its the instinct to further your own genes (in Neo-Darwinism any gene that does not in some way promote its own survival gets lost). As a result men will be allowed much more promiscuous behaviour than women in Capitalist society, which is what we actually saw until WW2 and women starting to abandon child care for paid labour. Now that women bring in a large part, even larger part of a families income the wife does not care whether she is looking after the husbands children or not. If he doesn't like it then leave, she can afford it herself. From his perspective however he doesn't want to give money to another man's children so his investment in the family is reduced, or even extinguished and he has no reason to stay around. I believe you see this a lot more in Caribbean families where traditionally women are strong and unfaithful, and men therefore have no loyalty to the family. Female faithfulness is key to male loyalty. Which is why if the male cheats it is so devastating to the female because she has made this sacrifice to keep him (presumably for the money to support the family). On the other hand though, if she cheats he will lose interest in supporting the family as he can no longer be sure they are his children. DNA tests solve this, and there should be law to make DNA testing a legal requirement if the male has doubts. Marriage is obviously intimately linked to all this, which is why Gay Marriage makes literally no sense traditionally. But what has made it meaningful is the possibility of surrogates and technology. Now gay couples can "sort of" have their own children and so sort of have "families." I started off with Genital Incompatibility as a concept but really this has only evolved because of the really fundamental dynamics of "making new humans."
Quick biology lesson. Humans are Diploid which means they have 2 copies of the DNA. To make a new human traditionally you take 1 copy from one partner and 1 copy from the other. This is the very reason why there are 2 sexes. Its then the reason those sexes "go together" and why there must be genetical compatibility. This is the underpinning of the whole structure.
If HomoSexuals wish to take part in this process of forming families and children we await the day when a mechanism is created to enable one DNA copy to come from 1 gay parent and 1 from the other.
But its worse than this because parents are not equal. One parent must supply the cell for the new DNA. This is called the egg in animals, but all organisms through the multi cellular kingdoms do this. So one sex creates large cells for the new DNA and the other creates mobile carriers for the DNA so that it can find and unite with the other copy. That microscopic process is then played out in the macroscopic world with dating sites, people looking for each other and romantic tragedy like Romeo and Juliet. When Sophocles wrote The Symposium about love isn't it amazing that one of the ideas is the myth of gods breaking humans into two halves which must search for each other. This fundamental structure that we all familiar with, reflects the deeper microscopic dynamics of making new humans, indeed all plants and animal. This is why there are 2 sexes and why partnerships involve 2, and why they are different with one more involved in the creation of new people (the egg carrier) than the other (the mobile gamete producer). And given that each sex has a different role you need opposite sexes to be genitally compatible, but same sexes to be incompatible, which is why 95% of the population is heterosexual an seek opposite genitals in their sexual relationships. For breeding success in any organism you do not want incorrect sexes mating, that is not productive, and so you make it impossible for homosexual partners to actually copulate forcing them into heterosexual partnership.
A section here on genital compatibility in the animal kingdom. Mammals can actually have sex with each other. This is called bestiality in humans. Given what has been said why are we not genitally incompatible with other animals? Well the assumption is its easy to tell a human partner even from our nearest relative the chimpanzee. There is no chance of mistake. But in the animal world not so. Lots of insects deliberately look like each other for camouflage or mimicry. A testament to the importance of not wasting your reproductive time and energy is the huge array of variation that exists in colouration in insects. And even more important the huge array of genital types that stops breeding between the wrong species. When identifying insects the real test used by experts is analysis of the genitals. Most insect species in fact come in groups that are so similar you need to study genital compatibility. But with visible features male insects particularly come in all kinds of colours the butterflies most famously. They are literally like flying flowers. Flowers are actually highly attractive to attract insects that are used as pollinators. Male insects however are highly attractive to both attract mates but also attract the correct mates. And there can be Sexy Son Hypothesis at work and similar dynamics so that males actually become ungainly and flamboyant to prove their general health. Females it is argued evolve to be more attracted to these crazy males because it means their female offspring--once they have shed the male's absurd features--will be much stronger. Because males serve only one job of moving the sperm around, actually most of the actual hard work and practical dynamics falls on females. You can almost see this in human society where, especially today in West, males get criticised by females for not be practical for messing around with sports and abstract past-times, while the women are actually much more concerned with the real world dynamics of friends, family, house and child management. Anyway males and females have completely different gametes and as a result end up with completely different roles and so it is essential for them to have different genitals to ensure no mix ups.
Now with everything said there is no actual reason why you could not have a genital arrangement which there is a mutual exchange of DNA. You see this a lot in nature like with worms and molluscs. After "sex" having exchanged sperm, both individuals create eggs. The idea of "sex" doesn't work here because both functions are performed by both partners. However note that it still requires 2 as each partner needs another half to make eggs.
Why can't we just copy our own DNA and have children with no partner? Or alternatively have genitals that enable us to have sex with our self? In fact this happens in nature. Many plants can self-fertilise and many organisms like aphids can clone themselves. Why is it not widespread? Well this is the question of why sex evolved in the first place. Given how much time is spent finding a partner and merging DNA why do it at all? Sex evolved a very long time ago, about 1 billion years ago at current estimates. That is at the very start of life on Earth (by current estimates). That is to say evidence of genitals and sexual differences is visible in fossils from basically the start. It must be important. The prevailing theory is the reason that incest is outlawed. The children of brothers and sisters mating have much higher incidence of disease. The reason is linked to why we have 2 copies of the DNA at all. Often there are mistakes and genes get corrupted. If you have sex with yourself you are duplicating these same errors and so both sides of the DNA have them and they get far worse. It also means that once a bad gene occurs in the family there is no way out. Sex it is suggested evolved to keep mixing genes. This enables families to get new genes in and get rid of bad genes. Since absolutely all organisms do this even bacteria it is clearly very important. So another reason that sexes have incompatible genitals is actually to stop breeding with the self. The closest you can get with our genital arrangement is to breed with siblings, which is outlawed cos it is not a good way to make children. But if we were truly homosexual that would be outlawed anyway as the offspring would be mutants.
Now If a culture allows homosexual partnership then the genes for homosexuality stop being passed on as they cannot have children and this marks the end of the homosexuality! Indeed liberalism is the death knell of homosexuality. In pervious cultures where gays were forced into traditional relationships they could pass on their genes!
So why homosexuality at all? Prisons are full of people with polyploidy and two Y chromosomes. It seems the Y chromosome makes you violent. One argument is that genes to counter this also lead sometimes to homosexuality. Not sure if proven, but just an example of one genetic argument.
But times are changing and the technology will soon be available where one lesbian partner can artificially fertilise her partners eggs. And more problematic but possible the DNA from an egg can be replaced with fertilised DNA of two gay partners and the placed in a surrogate. It seems a lot of work just to meet the desires of partners and their particular "sexual attraction" but this is the modern culture where getting what you desire and want is everything (not saying that is a bad thing--except Flowers from Dhammapada suggests problems--but times have changed and before it was not like this).
But why after all this is anal-sex so frowned upon? Time up ... TBC
===
No idea why anal-sex is outlawed yet. But instead a reason why it shouldn't. Our closest animal cousins are the chimpanzees and famously there are 2 species. The familiar ones, but also the Bonobo. Bonobo society is matriarchal and sex plays a central role in social bonding. It means that all males have sexual intercourse with both other males and females and clearly for reasons beyond procreation. Do this suggest that sex in humans like with Polynesian culture could play a role in social bonding and grooming and in fact, if Polynesian culture is to go by, if there was no chance of passing on disease it would be? However the other feature of Polynesian culture was that it was Socialist and not Capitalist. There was shared ownership and society was organised around the community. In Capitalist societies where there is private ownership, people naturally want to limit children so that the capital stays in the family. This for instance is why Aristocratic society often breeds cousin so that the family titles and wealth remain close, and why Aristocrats are often inbred and show signs of genetic illness.
===
Lesbanism was never made illegal in the UK. In fact there has never been any legislation regarding lesbians. Lesbians are and have always been free in the UK. The only restrictions have been on Male Homosexuality and in particular anal sex. So this very much underlines the global problem with Homosexuality that it is not male/male interest but the fact that male homosexuals have a tendency to take part in anal sex. It is Anal Sex that is outlawed both in Homo and Hetero-sexuals. This goes back to Jewish Law and is the Law across the world since the dawn of time.
So the LGBT community has rather misinterpreted history and rather misunderstood the problem. If they were the agree to avoid Anal Sex like the Heterosexual community then there never was problem.
In 1989 Anal Sex was made legal in the UK as part of of the Poll Tax bill and this was actually the great change in legislation that over turned the entire history of the human race. Gay Marriage and Gay Rights are just secondary things, and actually don't even apply to Lesbians who never had reduced Rights.
This does rather suggest that its only one particular genital compatibility that was at issue and that was sex involved two penes, but only when it included the anus.