The person quoted in this article, Petter Brockman, is a former zoologist who builds exhibits and does school tours at the Natural History Museum in Oslo. Hardly an expert. It's irresponsible to believe something just because it's posted on the internet. Don't be ignorant, people. There is NOTHING that fully explains homosexuality in humans. There are studies that explain homosexuality in some of the gay community (abuse, hormone imbalance, etc.) but nothing definitive that explains 100% of homosexuality, unlike heterosexuality. Check it out for yourself.