Yes, some are caused by genetics, but imo not even half of them. If what you say is true, then all gay people should be born gay. it is not that way in the world. There are tons of people that will go from straight to gay to bi back to straight in a month, and its pathetic. I dont imagine this world, but what i believe is that God imagined it. And he did not want it. Just like having sex before marriage, God did not want sex to become a thing a pleasure, rather a form to give birth. Those things that you said about everyone one being women, or with one leg, are impossible. Because men and people with 2 legs exist (people having one leg would not be so bad anyways). Gays continue to grow, and i only use that to state why i do not beleive in it. Scientifically, it is not. The human body is MEAN'T to have an opposite sex to offspring, it could take centuries before humans adapt to the point where we are able to live otherwise. 

I love it, i do not think we would have made it this far as a race if it was not for religion and the belief of a stronger being.

Just as a side note, I’m not certain whether homosexual couples adopting would have any impact on orphanages.

I don’t have the exact statistics in front of me, but the waiting list for adopting a baby throughout most of the western world is several years long (4 or 5 years last I heard) and children that are too young to be in school are rarely orphans for longer than it takes to complete the paperwork on an adoption. Unfortunately, after the age of (about) 8 or 10 years old a child stands almost no chance of being adopted because people assume that these children are damaged; which is often the case. People are willing to go to the trouble of adopting children from foreign countries (where it is likely that the child has fetal alcohol syndrome and will be maladjusted and violent) than to adopt an older child.

I see no reason to believe that homosexual couples would not have this bias

As an agnostic, I have to respect religion for their use in history. Religion brought people together as a group. People with a common religion tend to work together. The problem today is that religions are so different and consist of so many people that they become stumbling blocks when it comes to uniting the planet, which is my hope. Fortunately, science and reason are allowing different cultures to be unified.

@RockSmith -

To be fair, its the ideology that separates people. Its not a matter of religion. After all, the biggest split of people and people groups during the 20th century wasn't Christian v. Islam, it was Communism vs. Capitalism

nah, you just think it is because you actually live where we are now. People back then fought about this just as much or maybe even more than we do now. There were probably alot of more religions back then trying to change to planet. Even if there was no religion, there would always be people doing this =/

Good point, people will always fight over something.

IMO? And who are you to say what causes homosexuality? Have you made a scientific analysis on the case? How do you know that not all gay people are born gay?

Gays continue to grow? If we agree that a determinate percentage of the human population is inherently gay, then yes, they continue to grow as mankind continues to grow. But it's ignorant to say gays grow at the expense of straight people. You only see more gays now because the society has progressed a bit and it's now possible in 75% of the countries in the world to be openly gay without any major consequences (hopefully), without being burned in a stake or stoned or whatever.

The human body is not meant for anything, not every human is able to reproduce, nor every human is even willing to reproduce. So everyone who doesn't have 10 kids is a disgrace for mankind? Why should I have kids? I could be straight, happily married and still not want to have kids, and it would be as natural. And I also could be gay, donate sperm and for artificial insemination on a lesbian woman and I'd still be gay, she'd still be lesbian and there would have been an offspring.

I don't see where you want to go with the birth argument when it's a complete non-issue when talking about homosexuality

please tell me you are joking. a child having 2 fathers and no mother would be the worst thing ever to happen to the child.

Not true. While I don't agree in how easily it would empty the orphanages, as has been modified in a later post by RockSmith, it would be a step in the right direction. The worst thing for the child is to be left, unwanted, in an overburdened system, with no network of support for when they turn 18 and are kicked out of said system. These children aren't going to know what it's like to be in a loving family. They can't suddenly afford to live on their own, so they become a burden on another system, further creating a need for them to be dependant, rather than an individual. Whereas, say, an 8 year old gets adopted into a caring family with 2 fathers (or 2 mothers), then the child can see what love truely is like, and have a support to fall back on should shit hit the fan later. And when that awkward time comes, there's someone they can speak with. The only detriment I could see from this is some extra teasing from some kids at school, but if anything, it would make the kid come out stronger, and realize who his true friends are.