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Whether or not somebody takes off their shoes before entering his house does not affect the "true happiness" of anyone except an emotional, fickle person. It sounds as if you are defining "good" by that which causes "bliss" to me.

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Fred didn't really care about the shoes... but to purposefully disrespect someone... most people care about that, don't they? To treat someone as inferior... most people wouldn't appreciate it, and it would decrease their happiness, and probably hurt any sort of friendship that they had, right?

So, point is... Albert's values made something wrong for him to do, although it was right for Bob to do it. Different cultures have ways of interacting with each other due to a difference in values. This aspect plays a part in morality, I think.