I think that this concept of holding an object at such value is already interesting in itself. It is a natural tendency for humans to automatically be connected to something that becomes theirs. It's that primal aspect that was from our evolution as human beings. Humans are naturally territorial and are always looking out for their possesions, rather than that of others.

A lot of issues concerning morality are almost always based on what we've been through - our experiences. It goes along with "learning from our mistakes." People tend to trust those who have more experience with a certain problem, or those who have been through it before. The argument of saying that "I just know it's wrong," is not a good enough answer brings up the question of what makes it good enough? Scientists who think logically and need proof have to realize that a lot of what makes the "rules of life" were made from what we realized what was wrong, because of what was felt, what was thought, and or what was said at the time.