And you should read the studies you are trying to cite. But then you can't quote out of context. Here are some snippets from the article you just linked.
"Epigenetic differences are one obvious reason and this study provides evidence for this. However, the small study needs replicating before any talk of prediction is realistic.”
(Kung Fu's big evidence is a study from 37 twins).
"Prof Darren Griffin, Professor of Genetics,
University of Kent, added: “While there is strong evidence in general for a biological basis for homosexuality my personal impression has always been one of a multiple contributory factors, including life experiences."
(The evidence is actually suggesting strong biological basis)
Obviously, we are going to get nowhere by me citing one study, and you citing another. So let's break the whole argument down. Constructionist and postmodernist theories about homosexuality (like Kung Fu's) cannot be scientifically tested. There is simply no way to prove what they are saying. That's why they take studies trying to prove a biological case and spin them around.
Your opinions are great and fine Kung Fu. But that's all they are. Science is never going to confirm that environments make people gay. It's literally impossible to calculate. But here is one more calculation for you to try to spin.
"Homosexual female probands with monozygotic cotwins, dizygotic cotwins, or adoptive sisters were recruited using homophile publications. Sexual orientation of relatives was assessed either by asking relatives directly, or, when this was impossible, by asking the probands. Of the relatives whose sexual orientation could be confidently rated, 34 (48%) of 71 monozygotic cotwins, six (16%) of 37 dizygotic cotwins, and two (6%) of 35 adoptive sisters were homosexual."
Read it and weep bro. There is clear evidence of a biological link. And nobody is saying that it's the whole story. But this is highly relevant and any denial of such is just more postmodernist garbage.