conkermaniac said:
Untrue. The Human Genome project has neither proven that homosexuality is genetic nor that it is not. I read in an Economist article that most biologists suspect is that it is genetic, but they have not been able to prove it.
On the contrary, all evidence supports that there's no genetics involved. There is also no evidence that it's natural behaviour whatsoever. The anus just simply is not a sexual organ and to be used with one is like putting a square plug in a round hole.
Here's a run down of the argument on the side of the pro-gays:
Sexuality is like gender it's "hard-wired"/genetically determined (a biological fact) and impossible to change.
Evidence directly disproving this:
* - Homosexuals make up (about) 2% of the population, whereas left-handed people - a true genetic minority make up 10%. Also, although left-handed people can be taught to use their right hand instead, it will still be more natural to them to use their left hand. You talk to my grandmother, she writes with her right hand because she was forced to do so, but she's really left-handed.
* - Simon LeVay
"Time and again I have been described as someone who 'proved that homosexuality is genetic' ... I did not."
A fundamentally flawed study which produced no evidence that genetics are at all involved.
* - Bailey and Pillard's brother study "found" that when a gay man had:
1. An identical twin, 52% of the time the twin was also gay.
2. A non-identical twin, 22% of the time the twin was also gay.
3. An older/younger biological brother, 9.2% of the time the brother was gay.
4. An adopted brother, 10.5% of the time the brother was gay.
Really all this indicates, though, is that there are environmental factors at work here. In identical twins it should have been 100% if it was really genetic. The study was flawed because all brothers were raised together. For a meaningful study you'd have to exclusively look at biological twins and brothers raised separately. What's more adopted brothers were more likely to be homosexual than biological brothers!
Further the only difference between non-identical twins and older/younger brothers is that they were raised at different times. There is an environmental difference, not a genetic difference. If it was genetic these groups should be exactly the same - ie 50% chance if their brother's homosexual that they are too.
If you can look at those results and conclude any other way, well then you're dreaming. There are very few people today who would try to claim it's genetic when there's no evidence for it.