Social mores developed through both rational and emotional processes over long stretches of time, so I think that makes sense. I have to say, it really infuriates me when people claim to be rational, as if it somehow exempts them from the effects of emotional attachment. I am not at all attributing that to you, by the way, it's just that I'm surprised at how unaware people are of the deep influence that forces other than the rational have on human behavior and how some people think that they are somehow outside of that.
It's true -- claiming rationality in the sense of being beyond the evolutionary effects of lust, envy and so on is a bit ridiculous. I meant in the sense of being unable to acknowledge that I know thinking this way is wrong and silly, and still thinking it.
Mmhmm. There are many things that I rationally believe aren't true or acceptable, but react emotionally to all the same. Jealousy, for example. Still, I think it can improve with time. The good thing is that you know you have this bias in your mind.