Every single so called logical argument against homosexuality can be proven wrong. For example: 1) "Homosexuality is a choice" - Really? Every single piece of scientific evidence and essence of common sense dictates otherwise. 2) "Homosexuality is not natural" - It is found in over 400 animal species. 3) "Homosexuality is morally wrong" - Why? What exactly is morally wrong about same-sex relationships? 4) "If homosexuality is ok, surely according to you, so it paedophilia, incest and bestiality" - Homosexuality causes no harm to ones health. Paedophilia does as a child cannot truly consent to such relationships, this is why the age of consent exists. Incest can results to very serious health problems and ultimately leads to genetic degradation. Bestiality again, there is the issue of consent, something of which an animal can never give. Not to mention it is predicted that many, modern day STD's originally "began" because of sexual intercourse with animals. Diseases with were harmless to them, were passed onto, and caused harm to humans. 5) "My religion says it's wrong" - Just because an ancient (often very outdated) institution, which has very little real knowledge on the subject, says it is wrong, does not make that institution right.
It is like saying there is not single one logical argument against pigeon. It doesn't even mean anything. Maybe you meant - There is not one single logical argument against legalizing homosexual marriage? OR There is not one single logical argument against having homosexual sex? OR There is not one single logical argument against falling in love with same sex person?
Science clearly states the reason for sexual attraction is reproduction and therefore, we are given several possible reasons for sexuality: 1. It is a disorder, caused by something physically in our brains that screws with gender recognition 2. Homosexuality - as an action - may be caused because of an individuals inability to recognize that a mate is a member of the same sex, or the other individual is simply androgynous enough to cause attraction by the same sex 3. Homosexuality has some mechanism, possibly as a mechanism for population control. However, this would not explain homosexual tendencies in animals that don't have problems with over population. Therefore - whether or not there are logical pro stances - there ARE logical arguments against homosexuality.
To many Believers, their faith IS a logical reason. In fact, the topic of Homosexuality can make Muslims agree with Jews ... Both agree with Christians ... it becomes a valid argument whether Non-Believers acknowledge it or not.
The nature of human bodies. The shape of a penis and a vagina clearly shows us they were meant to be together. This is basically the only 100% sound argument against homosexuality.
I think the only logical argument, if you don't believe in religious nonsense, is that homosexuality is against our purpose as a species. As a species our technical goal is to reproduce and then die. However, homosexuality is considered a variable as it is nature's way of slightly keeping the human population down. I mean, I'm fairly certain that other species has homosexuals, but that means that those homosexuals are still against the specie's purpose since they can't reproduce.
Im Bi, and there are plenty of reasons why its not a great idea to end up with another girl