This is interesting. I am just trying to wrap my mind around this (and not really succesfull) so my thoughts are a little scattered.
For the moment I jsut want to ask somehting about your last post Terry. Maybe later I will come back to somehting else.
I understand, what you mean by it is in someone's nature or not to do something.
An example, that has not really to do with morality: I am doing gymnastics. When I learned a new skill on beam, I did it first on a low beam, and could do it perfectly, but on high beam, I couldn't get myself to do it. It was not in my nature. If I would try I would fall off and get hurt. But my coach was a good coach. She helped me to work on my mind. After a few weeks, i could do it on high beam. Suddenly it was in my nature to do so.
Something that has more to do with morality: For a long time I thought it was really bad to say something good about yourself. Once I went to a therapist (for some other issues). She told me to say: I am a good person. (Or somehting similar.) I couldn't. I couldn't get the words out of my mouth. But at the end of the session, I could say it!
Weren't there experiments, to make people do things, that they wouldn't have thought they could ever do (or were in their nature), good and bad?
So what does this do to the concept of choices? If we can "change our mind", or someone can make us do so, regarding things that we originally felt, are not in our nature, do we in the end have choices?
Just some thoughts. Sorry if this is off topic. This belongs to one of the things that bug me from time to time.