The above article is very good. The thing that puzzles me is why GfS chose to post it. Perhaps it's because of the final paragraph, in which the author seems to be trying to negate what the previous part of the article is saying—and which, up until that point, which makes a great deal of sense from an evolutionary standpoint.

Note:   In Indonesia a few years back, the government tried to encourage homosexuality in an effort to slow Indonesia's burgeoning population problem.   Despite persuasion and offering certain encouragements to those who would "opt" to become homosexual, the attempt was a complete failure.

Despite the government offered incentives, no one "chose" to change their sexual orientation.

Don Firth