The article summarizes many of the latest findings, and those findings are very interesting because they clash with the poltical agenda of homosexuals and their sympathizers.
The homosexuality in nature argument has been debunked many times. Animals resort to it briefly when females aren't around but animals are quick to return to normal sexual activity when females are around. Besides that, should man imitate animals?
Anybody who uses your argument is not very well informed on the subject.
I suggest you start reading with the link in post 14 and then move on to the link in post 6.
From that, he appears to invite us to draw an unwarranted conclusion: that it's all environment, and none of it's due to having a psycholoigical pre-disposition. Which is, as I said before, pure crap.