In ancient time, sex outside life long legally binding marriage is illegal. That effectively rations females in equal share for everyone. The justification is no woman want to share anyway. Not true.

Prostitution is prohibited because no women want to be prostitute anyway. Not true. To the opposite, being a prostitute often pays much more for women with equal beauty than being a wife. Having a right to be a prostitute will give women some bargaining position that ensures that when they do choose to get married, they are reasonably monetarily compensated for their sexual service.

People say that homosexuality can cause extinction. How can there are still gay people in the world?

According to http://www.narth.com/docs/nothardwired.html, Dr. Francis S. Collins support the idea that homosexuality is not hard wired.

The heritability of homosexuality is “only” 20%. That is, the probability that an identical twin raised independently will be homosexual if the other one is will be 20%.

First of all, that is much higher than the “normal” probability of 2-3%.

Hence, while homosexuality is obviously inheritable, it is not hardwired.

That raises a lot of question.

So many people believe that porn is immoral while war is holy. So many others believe that war is immoral while porn is fine.

Interestingly, people sense of morality, in regards to porn and war, tend to be negatively correlated. Peace protestors are often naked, which would offend highly (self declared) righteous people like Osama Bin Laden and George Bush.

The religious militants, on the other hand, would often kill a lot of civilians, which would offend civilians a lot.

So, which one is right?

Perhaps, rather than trying to decide which one is right or wrong, it’s better to just observe and understand how different humans’ interests motivate different algorithms to classify right from wrong.